finaly 3 * ?-3, maybe 3or 4 atempts. Used bottom left 591-714, mid 541 and top right 508-511, I found other chest with life cristal at top Right total 3 life cristal at the end.

Now left to complete 3 * just ?-6. Was too close with all squads include helper at Top left, 508-511-541-591 and helper 722.

Updated

Completed. The last ?-6 I Used My 1st squad with 582 at Mid. All others squad include helper at Top left. 507-508-535 and helper with 534.