Yeah, Ancient Forest.

Make sure you level it up to Flash, because that's basically Death on all enemies.
Not as great as 4x-Cut, but it's really handy on weak enemies and for leveling up Death Penalty.

I say use 4x-Cut for two characters, and have the third one use Flash; otherwise, that third char sould Mime the 4x-Cut from the other ones.

#1:
4x-Cut

#2:
4x-Cut

#3:
Slash-All (Flash)
Mime

Yeah.