1. Eagle Eye of Kreg is a sad thing. And is it really necessary to increase attack in this way at the second level? After all, Kreg (like Shakti, by the way) usually levels up normally. Recently, I played with Deis for the Citadel – his leveling was quite good, by the way (he has a skill tree similar to Shakti's).
2. Kal't. If Kal't is not available, use a different tactic. Use the third hero to grind for resources. Don't try to fight all battles with the main hero. Upgrading birds is effective, but it usually comes at a high cost in terms of time...

Орден Феникса – харизматический :) лидер