Doc Oc. Tried to use heal block, but then just ended up using infinite power lock and keep him in the corner. Long fight, but doable.
Is that a R2 6* Sentinel up top? If so couldn't he just heal block with sp1 spam or paired with despair stifle the regen with sp2 incinerate spam? Edit: looking at pun99 PI I'm guessing just R1 Sentinel, but concept would be the same just slower.
What about guilly build to sp2 then just evade until his regen is at 30-40 then drop sp2
Iron Man Infinity War. Sp1 heal block is much easier to cycle compared to an unduped Sentinel. By the time you reach 100 analysis, his regen stacks might be too much for you to handle.