So, devilites are one of the few truly transforming creatures in the game.
- Pit bosses can transform baseline devilites of any status-type into either their frenzied version or nonelemental yes-men (the only kind)
- Killing a pit-boss near a yes-man turns the yes-man into a non-typed frenzied devilite
- killing a pit-boss near a frenzied devilite turns the frenzied devilite into a pit boss (this may work for non-frenzied as well)
Obviously, frenzied devilites (of any variety) are noticeably harder to kill and deal with than normal devilites, and yes-men and pit-bosses are trivial to deal with as long as you kill the yes-men first. The real question is... if you mostly care about the loot, and you have enough skill/gear/resources that the difficulty changes aren't an issue, and you can herd them and pick your kills without undue danger, what should you be arranging in order to get the best stuff? kill them while they're frenzied? Try to kill every single one of them as a pit boss? (doable, if a bit tricky at times) Something else?
If there are any Yes-men around, killing a pit boss makes the yes-men turn into overtimers. However, when they transform, they also drop loot as if they were killed. And they drop loot again when you kill them as overtimers.