Tower attack?
I saw some potential here, and the game is alright (for example, i love the castle upgrade system) but the game just has flaws. It does get very boring very quickly, but the main problem is the sieging itself.
The whole point of the game is to make you the Villain, in case you're bored being the heroes or defending places you get to be the Villainous attacker, hence the name. But I don't feel like i'm attacking, I don't feel like i'm destroying the place. Every time I play I have to send out my aura unit's and defend the raider, so in a way, it's actually a defense game....ironic?
Point is, when i send out my little organised line, ignore the towers and just get my goblin to the town at which point he makes some points appear doesn't feel like i'm actually attacking. I'm going through all the trouble of organising my raid (7 people) only for the lowest pay-off ever.
Now, I don't like comparing games because i support creativity and I don't want to come off as saying "MAKE YOUR GAMES MORE LIKE THIS" but if i were to pick out...Mastermind World Conqueror, and play a bit of that, it would actually feel like i was doing something, like I was an actual Villain. The whole villainous destruction has been taken apart since all i can do is watch my tiny patrol project bubbles so i can reach the town where i will then teleport to the start after not leaving so much as a dent in the visuals.
TL;DR: Not very immersive, boring and repetitive.