LogFAQs > #971690098

The general direction of wave 4 is pretty easy to guess from the trailer they recently released. Way more excited for this than I was for Torna, which I still haven't finished.

The new hero requires chapter 5 by the way so you won't be able to get her for a while (chapter 3 is required for the older DLC hero). Levels scale to 30/50/70 for gauntlet mode so you can definitely try that out before the end of the game. Pretty decent renewable source of rare stuff like gold nopon coins and those shards you find rarely in the overworld or from smashing NMs.

I've managed to get precisely halfway through hard pro gauntlet (the hardest tier lasting 140 stages) and it gets pretty challenging even doing pretty insane damage.