I'm a day 1 player, and I never bothered with IT cause I only leveled up the characters that I liked, and it felt pointless to attempt to clear that game mode since I didn't invest horizontally.
This cycle though, I actually read the reaction buffs and played around them, and I managed to clear it even though a lot of my characters were lvl 80 4*s with cope artifacts.

I had a lot of fun.