Looking for my next rank up, not sure whether to rank 1 to r5/r2 or a couple to r4. Have plenty of resources to take from lower levels.

-Key-
Top row - r5 5* and r2 6*
Blue to red - r4 5* and r1 6*
Red to yellow - r3 5*
Yellow to white - r2 5*
Below white - r1 5*
Thank you for your time.