I just got started tonight on the KDF Masters Of war series, but on the second mission Episode 1 Part 2, I got to the end, and tried for a half hour to kill the Chief Medical Officer. I switched to bat'leth, then back to disruptor, and nothing could kill him. In the rare times that I could expose or crit him, and he'd immediately heal to full health.
From the reviews, it's clear that this mission is completable. What's the secret? Stacks of large power cells?
Since this is a popular series, I am sure that people have accomplished killing the uber Chief Medical Officer. Perhaps one needs to be laying a tactical officer to get enough burst damage to do it. Could it be that my science officer cannot arise to this challenge?
Pile on the engineers with turrets turrets turrets. Basically the way you overcome any difficult situation until season 4 goes to holodeck. It's definitely easier on my tactical officer, but on my science captain I bring a fourth engineer instead of a medic like I do with my tac.
You can also try giving your whole team sniper rifles or type 3 phasers or other things with knockdown, or even getting in his face with a bat'leth. Knocking medics down at the right moment so they can't get a heal in is sometimes enough to finish them off before they do.