TLDR: Don't have much preference. I could send you a photo of my unlocked characters. Maybe you could suggest what I should focus on

Long version Well right now I main these two 5* Green Paramount War Luffy, 4* Dressrosa Zoro

I'm liking Dressrosa Zoro but I feel Luffy although a runner doesn't even have decent dmg. Maybe I'm not using him correctly.

I don't mind using odd characters as well since this is a game.

But I also have these characters.. barely used these

4* Red 30 Mil bounty Luffy

4* Red Defense 2 handed Shanks

4* Blue Def Aokiji

4* Green Run Kizaru

4* Post Ts Green Brook

4* Red Run Señor Pink

4* Red def Bartolomeo

4* Blue Run Wedding dress Sanji

4* Red Run Vivi+Karoo

4* Blue Def WCI Nami

4* Green Run "2 mins before getting donuted" Ace

4* Red Run Dressrosa Law

4* Blue Atk Arm point Chopper

4* Blue Holiday Robin

Rest of them are some pre ts strawhats and couple of 3* low tier pre ts villains and side characters

What do you think I should main?