Best options for rank ups and who to use

KClifton67

These are my 6/5*s, currently lacking resources for rank ups, but who should be my next few? Currently only completed 6.1, no variants, just monthly side and cav EQ. Not been in an alliance for a few months, should I?

Marostrange2005

bwdo,thing,scorpion,cap iw,nimrod should be ur focus