Need advice with StarSpawn

supermariodbz

I need help with my campaign on a certain type of enemy. StarSpawn will play a major role into the campaign, but the they seem to be a little OP. I need assistance and ideas into making them easier. If you could me stats of your version of StarSpawn it would be really helpful.

They are LV 12-15 would help


D&D 4.0 is what i'm using