What's your worst Incursions fight?
I had a fight vs. Mr. Fantastic yesterday that I'll remember for a long time. Some highlights:
1) He regened 1% health every second unless I had a buff active.
2) He nullified all buffs on me every 7 seconds, and gained power from it.
3) He gained power whenever I was far away from him.
It was one of the gnarliest fights I've had in a while. Not only was it difficult to have the buffs required to stop his regen (and 1% per second, in late-stage Section 6, is nothing to sneeze at), but his power gain was immense and constant. I was doing the fight with Hercules and while he could maintain his buffs fairly decently, his infuriate debuff caused all kinds of issues since it only fed Mr. Fantastic's evade. Whenever that evade triggered and Mr. Fantastic didn't immediately punish me, he would suddenly be far away from me, which in turn granted him more power and pushed him further toward an SP3.
I ultimately won (with the help of a few revives), but the Nimrod who eventually bested me a few rooms later was not as exciting, node-wise. Although I guess a combo of "deal almost no damage unless you have a bunch of debuffs on the opponent" and "purify incoming debuffs every few seconds and heal 10-15% health each time" was also really annoying.
It's always fun to see what fresh nightmares Incursions come up with. What have you experienced?