You can progress to the next main boss if you want, but definitely do the DLC after that. No further.Finally came back and beat Micolash after putting the game down for a year or so. I've been told to avoid fighting any more bosses and to go into the DLC at this point. Is that true? Apparently progressing any more sets stuff on fire or something.
Anyway I've totally forgotten what build I was going for. Looks like primarily a STR/SKL build but I've got BT at 22, so clearly I was trying to level that up. Not sure why.