Specialist - Accumulate 10000 heal points health in a single life.
Thanks to the on-hud Chief of Staff achievement tracker, I can see that on a good life I'll accumulate ~1.8k-2k healing. My record somehow is 6.7k, but I can't even remember what I did so special on that map (all I know it was CP Egypt; perhaps that server rigged medics in some way).
How would one heal 10k hitpoints in a single life? Overheal many different team members? Uber like there was no tomorrow?
Achievement servers and maps need not apply. I'd rather not earn an achievement than just getting one.
Specialist - Accumulate 10000 heal points health in a single life.