Rank 3 4* against boss rush.
Ohk so I have 5/50 4* , but no good bleed immune champ , so I used my 4* 3/30 ghost rider against blade . Not sure why but the control was not smooth at all , and also i used my dormammu , the game lagged like hell . I am pretty sure my phone works fine , so is this problem with 6* or the game AI .
P.S -I have completed the challenge .