This is an alternative strat that can be used for UB2-3.

UB2 sometimes gives me a lot of trouble and I've cut revives from my run so I prefer the safety.

If UB2 gets bad RNG from Liberate and doesn't die, he will jump to center stage and should take one more enter2 to kill. In this case, it adds about 5 seconds to the clip you see here.

It's fastest by a couple of seconds to do UB3 how I did it here. Hasting and gunning him down to death takes a tiny bit longer, believe it or not. Also, since you only need about 12-15 shots (depending on crits) you can use the time you wait for PE charge to heal WITH MEDICINE.

(This video is 2minutes 45 seconds from start of UB2 to end of UB3. Primus video is the best video I had to base current strat off and was a 2minutes 53 from start of UB2-UB3. He conceded a few heals for security so can easily call it even)

All in all, saves some stress and about breaks even with a flawless normal strat UB2-3.