Is there anything you wouldn't have done if you knew it before?
For me, I wouldn't have ascended Yoko so that he would not use Taunt and prevent others from using their specials in defense. Totally destroy the bovus, yoko, tsume combo.
And I wouldn't have wasted golds purchasing those 400 xp portions. I really thought it was a good deal but it turns out that I have so many in surplus.
What's your biggest regret?