OPTD IV Platinum version 4.24 : nightmare mode guide (extended)

I planed to post all challenges guide with the original guide but the forum forced me to do this; besides the devloper will release new challenges in upcoming version so the best decision is to make this post specificly for nightmare mode

Unlocked after you beat : Louge town
This is the easiest set of challenges, they are all beatable without too much effort, i'll only mentione 2 challenges which may confuse you.
-BE STRONG:
Nami + Usopp VS buggy Kuro
this one becomes suddenly easier when you unlock "thunderbolt tempo" and "cyclone tempo", which will cause provoke and stun which repels thier powerful skill from a side and defeat them from the other side.
-TRIO MONSTER
luffy + zoro + sanji VS don krieg + arling + kuro
If have difficulties try to use stronger cards and target the strongest/most annoying enemy first then the weakest later.

Unlocked after you beat : skypia
this has various difficulties, but the only issue is the 3rd otherwise the rest are resonable
-ONE MAN ARMY
zoro VS 2 millions + 2 billions + MR5
This the first (and the last) time you fight more than 3 enemies in this mode, it should become easier once you beat enis lobby due to powerful skill unlocked there, otherewise equip cards with high RNG and INT and don't forget zoro ATK card، and put zoro in shelter row,his RNG should be high enough to kill all milloins and billoins with the ultimate skill, then put him berseker and you know the rest.
and your AP Is halfed but shoulden't be a big problem.
-CAN WE JUST TALK?
luffy VS zoro
i advice you to use ranged skills because they are more effective than melee skills anf if you have daz bones card don't hesitate to use it.
-BLIZARD
chopper VS wapol
HERE COMES THE HARDEST PART, well not really but the issue is incured on easy/medium mode since it's immpossible to equip lvl 4-5 cards, but you better first raise chopers lvl to 45 or higher in both cases, but that's not all the boss has annoying move which is abusing "defened" at low hp making the fight longer. and his "bero canon" and "multi bero" canon cause more damage than other skills (without forgeting the provoke anf wildrage effects)

Cards formation ( hard mode):

Cards formation(easy & medium modes) (prototype):

-GIRLS FIGHT
nami + robin VS vivi + MRS valentines + MRS double finger
if you have difficulties, focus on END robin's ultimates will help too.your bestfriend is stun effect which cancels thier turn and thus repel them,vivi has slightly high EVD so let her the last girl standing
-PALM AND KICKS
sanji VS wiper
if you are.luck you won't need to use poition at all, just use ranged skills for easy victory
-HERO
luffy VS garp
this boss has a strict skills set, he will start with justice skills then throw 2-4 canon balls and finish with his "hero punch" (or "great hero punch" at low hp) so you better equip END cards and luffy TRK [E] Card, since the mentiond skill ignore your END GG Fusen should reduce the damage and prevent instant kill (but don't let your HP down) and make sure to take your ouprtunity when his PWR debuff is over because he always use justice afterward

these are like "advanced" challenges, the difficulty varies and you can earn most of summon cards here.
Unlocked after you beat: straw hat camping
-REUNION
Nami + Chopper + Franky VS Brook + usopp + Robin
well... every one of them has different strengh but same weakness (even if you can only equip lvl 3 cards)
i advice you to use "coup de vent" and "max cola: coup de vent" skills to finish them off, however nami and chopper won't stay watching, use "cyclone tempo" and "cyclone burst" to provoke the enemies (throw knife EX -if you play in hard mode- will also help) and use scoop to debuff a powefull enemy
-COMEBACK
Luffy + Zoro + Sanji VS X3 pacifista
The 1st challenge with time limit, so focus on 1 pacifista until you KO it, "Three thousand world" will really help
-UNDERWATER
the last challenge with time limit, but it won't be really important since the battle is finished under 4-6 turns, so raise up your INT and PWR and use "Three thousand world" to finish off this boss who use water based skills.
-SWORD CLASH
Smoker VS Law
I hope you followed my advice and trained smoker to (at wroste cases) 35 or higher, other wise reach vise admiral rank in marines camping and defeat the bosses of light and dark dungeon to lvl him up faster. and let me reminde you that you can't equip lvl 5 cards...
you'll start with freeze effect which means there is no way to repel law from using "room" that buff his RNG and INT and thus making his slash and blunt skills more powerful. most of you will act smart and try to seal him but law will always use "luxurious poition" that he gor them from who knows where? but he use them anyway every time he is sealed. BUT he has another weakness which is provoke. you may use medical kit DX tl remove max HP debuff
-BROTHERS
Sabo VS Burgess
this challenge is easy since the enemy won't really use all of his signature skills, and it should become easier if you got Sabo [P] from TOQ light path thanks to it's ultimate skill.
-PIRATE ALLIANCE
Luffy + Law VS doflamingo
you will fight this boss 3 times, just use "gamma knife" for easy win, if you don't have this skill refere to the 2nd fight.
-DECISION
Luffy vs Sanji
if you have beeb using sanji with balanced RNG and PWR i advice you to switch to full RNG and put him in shelter for higher range state
-RAGE
Luffy + Zoro + Sanji VS Bigmom
The hardest challenge in this set, and an introduction to what you'll have in ultimate challenge...
this boss Inflicts most of bad statues with her attacks (expect provoke, and seastone and freeze of course) and with double action she become more poweeful, so use Enchanced kid card for higher resistance of this effects (and she immunue to all bad statues expect seastone with higher resistance). her "scream" will debuff your states , but if you stole the weapon card you'll have a chance to reflect the debuff toward her, her "soule stealer" and "soul pocus" drain severly your health . she will sometimes use slash skills (sometimes with slash and fire) and her summons will either target one ally or all of them with fire/thunder elements.
at low HP she rarely use her weak ultimate skill
I won't post card formation since it's beatable with more than one card formation, just equip higher END/INT card, "three thlusand world" will work wonder if you have higher PWR and linlin has debuffed END, she has immunity of fire and thunder so don't use skills with these elements, good luck  

a few rematchs between luffy and his strongest foes
Unlocked after you beat: Enis lobby
-THE 3RD ROUND
luffy vs crocodile
if you play on hard mode you'll have slightly higher advantage, but i advice you focus on INT and RNG
-0 ELEMENTAL DEFENCE
Luffy vs Ener
it could've been easier if it wasn't for the rule, your thunder defense is always set to 0 so equip high INT to compenesate this lose
-DEATHMATCH
Luffy VS Lucci (leopard form)
yup you'll fight him alone but don't worry, laffitie R card ( for high evasion) and yassop flintlock (because the boss is weak against earth) should help.
-EVADE
Luffy vs Mihawk
X2/3 Das bones E card and you're done in term of defense...
-THE KINGS
Luffy Vs Doflamingo
2nd encounter aginst  mingo and sincd law isn't in your side i'll mention everything i didn't mention in 1st fight:
he use thrust and slash mixed attacks and activate a special effect that makes his EVE rate really realy high, so ranged attacks will help a lot, he may debuff your INT and instantly kill you with "5 stinger colors" skill if you have low INT, but what is incerdible is that he is weak against Thurst , and hitting him with heart stab abbilty will deal high damage, and he's also weak against provoke effect

CARDS FORMATION:

-MIRROR
Luffy Vs Katakuri
this boss is a bit toguher than the last one, but you can follow the previous card formation, and he is immunue to thrust and can use "advanced observation" to sharply rise his Evation rate
-BATTLE OF THRONES
Luffy vs Blackbeard
not sure what the rule means but the boss is very strong even if you remove all cards so focus on INT and PWR since (according to my expirments) inceasing your RNG makes him much stronger, dark def will really help.

HACKERS TIP :

Unlocked after you beat :  enis lobby and
the only set with fewest challenges that are played with characters of TOQ.
-CHAOS
-kid + X drake + law vs kizaru + pacifista
even though that gamma knife ultimatr had a big role in this fight, it will just be a tool and not a solution, and you better use ot against kizaru while you focus all your might on the other enemy, i advice you to make X drake breseker with full PWR cards, law with full RNG and kid with full INT so he can revive/heal the others
-FROZEN FLAME
according to the story kizaru should lose, but you know the devloper more than i do....
to make it easier equip all fire resistance cards and max out INT and RNG, burn resistance will also help in case you run out of LP too fast.
-PAYBACK
marco vs black beard
prepare yourself for this long fight full of AP overconsume (if you understand what i mean) make sure you balance between dark resistance (N.luffy [upgrade 1] will help) INT and PWR, since the enemy uses black hole to buff his INT go breseker and use melee skills, using zoan lvl2 will also help and if you're impatient use double action.
-REVENGE
law VS doflamingo
the last time you fight mingo, use gamma knife to finish him off.

these are the hardest challenges in the game you'll have all of them but 2 challenges with 1vs 1 fights, you'll start with the 3 admirals then with tougher foes, so beat tournament mode a lot and open might boosters for more better cards will really help, and i won't lie if i say the first3 challenges are the easiest ones.
Unlocked after you beat: straw hat camping
-HEAVEN AND HELL
Sanji VS Kizaru

Cards formation:

this card formation you won't only have higher Light def and INT only but you'll also have higher evasion rate and good chance for X2 turns, having anti-distract is optional since the enemy have higher evasion rate. so use ranged attacks and put sanji in shelter position. use veau shot to reduce kizaru damage (or get even since he will reduce your INT) and heal often (in case you equiped sleath black SS) at low hp Kizaru will use his strongest skill but it won't deal as much damage as usual. for more informations check the guide above.
-THREE FIGHTS ZERO
Zoro vs Aokiji
DOUBLE TROUBLE, you'll have to face zoro's low INT and fr freeze effect that reduce makes the next hit deal even more damage, and in new version aokiji got a new skill that can easly kill you, so good luck finding a battle where this skill is not used, and at low HP he will use a new ultimate skill that you can't use it.
the card formation should give you a  INT boost and anti-freeze, you can also use napoleon card to repel some of his damage

Cards Formation:

-BURNING BLOOD
Luffy Vs Akainu
This fight may terrify those who play on easier modes but  the solution is in this guide, AND BE QUICK BEFORE THE DEVLOPER FIX IT!!!!!!
to be continued...