mMy recommendation, Sal and rock paper scissors. If you have a sal, you can use the method that Bahroo (google it on you tube) mentions. It doesn’t matter if you sneak behind or not, shooting the bandit in the face from the normal range location is just slower. Big advantage: tape your controller/mouse and do something else like sleep (when started at nite).
So the biggest thing is a mule Sal. I have had one for ages and used him to lvl my other (existing) toons to 80. I push that op8 sal to 80 and then ran him twice for 10op. He also bumped my other toons to op10 because sal makes it easy.
If you have two of the same toon, I’d suggest cloning via cross save. You can have multiple builds without the fuss of lvling another char. You can then skip all this drudgery.
Take your max lvl char, make a mule account and a sal, then lvl him (by playing split screen and doing whatever you care to on your main). Get him to 80 fairly fast this way. Then all you need is a (fire is best) infinity, lady fist, RR or no shield, a com, the right spec and some tape.
If you plan to do more chars, I’d go thru the trouble of making him op as much as you care to (or just set a lvl 80 sal up over nite).
With the right gear, which is fairly easy on sal, maxing op is not much of a bother… but whatever level you care for (note: that toon needs to have started uvhm for op to stick reliably). If you first lvl sal to 30 or 50 then run normal and tvhm, it’ll go very quick because you’re op as heck. Start uvhm, then run the peak. You can just use your main to run story for your alt as well kinda getting two things done at the same time.