You should probably add a song for Elywen that summons monsters for those of us who want to train, fill chalaces in empty dungeons, or decided to play without using the walkthrough and had no way to know the endgame secrets are unobtainable if you don't do something right then. Frustrating that after beating the Fire, Water, and all but the gaurdian of Earth that I have to re-play the entire game to get a chalice.
This isn't really Epic War 3, by way of gameplay. It uses a completely different battle system, different units, and a new upgrade style. I would suggest calling it something like "Epic War: Commanders" or "Epic War: Struggle for Kingdoms" and making a third epic war in the same fashion as the first two.