Rank & Level Up?
Progressing player here, been playing bout 8 weeks, I got 13 4* n bout 55ish 3*. My 3* roster is extremely strong, I only have 1 r4 4*(Ghost Rider) 1 r3 n the rest are r1 & r2. So my ? Is; what level/rank for 4*s do u have 2 start watching resources n being smart about who u level/rank up. I'm assuming all 4*s for some1 in my position would be taken to at least r2 if not r3, since every 1 matters to me. N what would be cutoff level for 3* , 2/20 , 3/30?