@DoomEternalHypeNightcap already sucks. The only really somewhat broken things about her are Bunny Hopping and Sniping.
I personally find her damage to be a little weak, since she seems to kill as fast as Corn or Peashooter, but she has less health. So for now, the damage is ok.
Sniping could easily be fixed by adding Fall-off damage.
What makes her so strong is her evasiveness, and Bunny Hopping is a huge part of that. I think Bunny Hopping in general is a problem that needs fixing. Its not just a problem with Nightcap. She shouldn't have to rely so much on jumping when in combat
She gets rekt by stuns, gravity grenade, and homing projectiles aren't bad against her either.