Well, beat Ep4, the fights were still too easy, the gimmicks don't come through at all. In the first one there were flying generators dropping poison and the poison had to be defeated within 3 turns of spawning but it didn't matter that much, you can let three (out of four) of 'em expire and even then you can still clean it up with the super move of your new and highly motivated (increased movement points) character. The boss fight is a trial and error affair, the first time I got obliterated while figuring out the boss's abilities, the second time I moved slowly, focus firing on the heavy weapons (the boss only had two and one didn't cover the area you could attack it from, easy pickings) and defenders, leaving him crippled and unable to attack since even the heavy weapons died without getting an attack out. Then it was just a matter of leisurely picking off the weak point (yeah, there was some gimmick involved but again taking it slow and focus firing will prevent that from dealing any damage).
The game isn't bad but it doesn't try to keep you involved either.