Is that a yes-no question, and/or either-or? Is THAT question... er, let's not go there.
Anyway, Merethif just gave me a horrible idea (accidentally, so don't get mad at Merethif!) by asking a question (http://forums.spiralknights.com/en/node/28181#comment-16737) and I'm asking for other people's opinions on it.
Anyway, I think it would be ridiculously fun to have a big, slow gun with minimal area effect and huge self-knockback, kinda like the Magnus line I guess, so you can only slowly attack one target, but with super-puny split damage, no target stagger or knockback, and with maximum chance to inflict strong Sleep on target AND fair chance of Stun and Poison on self (no chance of Stun or Poison on target!) with all attacks- first, second, and charge. It would not be underpowered, though, and in fact be very, very popular, because of one other feature: moderate chance to inflict Curse on target with those attacks, and no backfire like Faust and FoV.
I would never, ever use this gun.