u/Mattaclysmic

I read that the tidalwave attack was essentially a DPS check and you need stalagmites to fall and stand on to avoid it. I couldn't do it solo because I could only get it down to 80-ish percent health. But this last time, a duo and I got him down to 62% before the first wave and still nothing fell, so it was an instant KO multiple times in a row.

What am I doing wrong?