I've been thinking about what makes FinalCrash' run so great and I think Aokiji is a better character than Luffy, because he can attack while he performs the 2nd Special move

With the right support characters, Aokiji can sweep clean most of my runs

I use Luffy because he's intuitive, he was my main for Story Mode, preference, because I haven't leveled up Aokiji AND because Special move nº 2 from Luffy can deal x1.5 more damage if the enemy is close to you (it's a glitch). This last glitch does not compensate the capacity to attack while Ice Age is still hitting.