I can help with Gee and Pete, definitely. Hyperius, I'm not so sure (reliance on Smasher glitch has my confidence wavering). I'll have to check and see what my Assassin build is, atm. (Since you are talking about Hyperius and Pete, but the Scarlett DLC, did you by chance mean 'Gee and Hyperius?')
Unfortunately I have a prior obligation IRL, tonight. I may be on much later in the night. No idea.
If not, definitely hit me up this weekend. My GT is same as my handle here.
For Gee you need a Siren with Converge, or a Gunzerker with Fistful of Hurt. Gee was tough even with the Smasher glitch since he seemed to have more health than Pete(Who had a whopping 133 Billion apparently) and his initial shield can't be damaged by bullets. It's actually a little easier to solo Gee then to go in with other people, otherwise he's all over the place as opposed to concentrating solely on you so you can manipulate where you need him and when.