Asterisk confirmed back in AE Kush was the IGL and after he left, Cud was the IGL.
The fact that asterisk refuse to answer nabskyy question of whether he's a good IGL (instead of saying he's never IGL-ing) means that he has been IGL-ing before for a short while and it's probably isn't good (which isn't a surprise considering they choose fucking Cud to IGL instead of him).
Edit : Oh, and also Cud is more like a last option IGL lol, you can't offer him as an option. They even hire adrnking just to have an IGL. Which kinda shows you how bad Valdyn was as an IGL since the not good IGL Cud was still better than Valdyn.