Swordsplosion build?

The Swordsplosion seems fun. I kinda wanna used Gibbed to change away from Maya, since I just started UVHM and used her for all of TVHM and vanilla.

I can't figure out who to use the Swordsplosion on though. I don't wanna use Salvador. Zer0 seems great but the Swordsplosion can't crit and from what I understand that's essential with Zer0. I'm not sure if Kreig, Gaige, or Axton would be any good with it either.

Which character other than Salvador would be most effective with the Swordsplosion?