Hero Acsdemy is kind of slow. Is it all about building up your heroes before doing anything? Tips?
Management of your units, try to make all yours move so you do as much damage as possible while putting yourself in the least disadvantageous position.
Example: Sending an unupgraded archer to take out a fully equipped Wizard, even if she may die next turn, you still lost 1 unit for 4 of your opponents (wizard, sword, shield, helmet.)
Also try to stay aware of what pieces are remaining in your deck and your opponents. If you know they're low on healers you may want to kamikaze one of them knowing that they would lose the rezzing ability for the rest of the match. And go after crystals usually when your opponent is going into hardcore camping mode with a ranged unit that can attack 3 spaces away.
That's the cliffnotes ;] .