Thanks for your feedback :D
We are considering the addition of a ""tower"" in the outside area to kill enemies automatically so players can focus on making runes, using gargoyles only for dangerous situations (increasing their power, their delay and automatizing reload). By doing that, you can focus on runes to farm power for upgrading.
About summons, yes, you are right. The attacker one probably needs more attack power, it is almost useless at the end xD.
Thanks again ^^