I'm a fan of the Epic War series, and it's nice to see a fifth, but I don't think I've got the attention span to complete. This is basically send in your units, leave your hero at home and let your spawns do all the work, the only spell worth casting is the heal spell, but it takes ages to accumulate mana.
I'm disappointed, if you want my advice, take it back to the drawing board, redesign the interface and give us something to do during the battles.
Note: You can't sell items, so drop them if you're not using them, just make sure you keep a broken pipe and a paper weight for a quest in the second area.
I'd like to add that firing cannons at the enemy ships decrease their value, so when you're going for your accuracy bonus make sure you don't get too carried away :)