I really like the concept, but the game has a few flaws that caused 2/5 stars:
1.) Very repetitive - fighting the single enemies on later levels is just using your strongest skill and a potion - again and again and again and again. Either make the difficulty curve steeper or drop half the enemies
2.) Castle siege mode too slow - takes forever to capture a castle, but it is not difficult, only the animations are slow
3.) What's the point of having so much build points all around castles, when there are almost no building to choose from?
Is there a way ( if is, i could not find it) to disable the FX fireworks at level up, or lower the overall level of effects to make the game run more smooth?
To fix the lag: right click in the game, press 'settings', then go to 'storage' (the middle tab), and put the slider to "unlimited".