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vasik, I completed the Remix on a hero, and I didn't even have to try hard on maps 4 and 5. In the second map, I dominated everything; I even thought it was too easy. If you can't play as well (I can't either; I only manage to complete it on Veteran difficulty, so no offense), you can always find a way to succeed by: one, not collecting all the fragments; two, not taking all the resources and artifacts; three, not taking all the upgrades (there are a lot of them in mission 3); and four, choosing a build at the end that minimizes losses. By the way, the "Fog Cloud" spell is available through summoning; it reduces the damage and initiative of enemy ranged units.