Best Dramatic Arc is Arabasta Arc & it's not even close
Best Adventurous Arc is Skypiea Arc & it's a Masterpiece for me
Best Fighting/Action Arc is obviously Marineford Arc (As of yet)
have to add something & to disagree with some of this..
but yeah... wano is very far from being the best war, in fact wano is the worse in some aspect..
- Most dramatic :
Water 7 - Enies Lobby : luffy vs usop, robin i wanna live, merry final voyage & death.. back to back drama
Wano : only yasuie death is good, others are bad (forced drama and repetition of old story)
- Most adventurous :
Skypiea (agree) & imo, probably Zou arc also very adventurous..
Wano : only adventure part is how to get to wano, once u get there nothing feels adventurous anymore..
- Best Fighting / Action (mini scale fight) :
Enies Lobby : luffy vs luci & blueno, zoro vs kaku, sanji vs jabra, nami vs califa, etc.. every fight is well choreographed
Wano : some fight are dragged eternally, yet some fight are forced to end too quickly, many fake KO/death (well.. nothing to say about this LOL) and backing up over and over in short period of time.. No good choreography yet.. except: Bigmom somersault and doing some FF7 Limit Break on Kid.. LOL)
- Best War (wide scale war) :
Marineford (agree) : some fights went offscreen, but it's normal.. there are so many admiral/yonko level characters involved and their ability will destroy wide scale environment, so it's impossible to choreographed every single fight or single duel without interruption..
And also.... Marineford is a RESCUE mission, they go there to SAVE Ace's Life.. (enemy want to take something from protagonist)
Wano : some fight went offscreen (it's also normal) BUT, compared to Marineford, Wano is seriously still lack of big names and wide scale destruction.. And Wano war is opposite of marineford, it's a RAID mission.. they go to war to TAKE DOWN Kaido to restore kozuki clan. (Momo's life at stake ? no.. it's the direct consequences because this time, protagonist want to take something from enemy.. besides momo is free now.. nothing at stake anymore).
If oda really want Wano war outshine Marineford.. i expect Oda should involve more big names and parties into the fight.. and war still far from over, Kaido defeat is just the beginning of the real danger..
My personal head-canon:
- Momo fail to stop onigashima from crash landing, and half of Wano population is dead (thanos-ized)
- CP0 & Marine (including sword) making a move taking advantages of the chaotic situation, successfully kidnap robin, and forced a ROUND 2 war.
- Kurozumi clan still has much more card in their sleeve and probably forced a ROUND 3 war. (They maybe somehow connected to Shiki or Blackbeard)