I'm having a hard time understanding how Gauntlet Mode works with respect to the new promotion system. You need very high level characters for Gauntlet, it seems. Given that my end-game characters from vanilla regularly get destroyed when the miasma levels get up to around 25-30. But you get a ton of XP in Gauntlet, and inevitably your characters are going to hit 100. At that point, you are of course going to want to promote them so as to not waste any XP you get. But then they're back at level 1, and as a result completely useless in Gauntlet. Unless you burn through enough growth points to get them up to 50 or so right away, so they at least have a chance at survival.
Or maybe I just don't understand how I'm supposed to be controlling the miasma levels? The game says that activating Dragon Portals lowers it, but whenever I do it only seems to lower it by a few levels, like 2-3 at most. And at other times I see it drop much more than that for no reason I can figure out.
I don't know, Gauntlet Mode is confusing.