Random piece suggestion: Spy
I was thinking about Spy from Team Fortress 2 and I thought the backstab and invisible mechanics were pretty cool. Here I offer a potential implementation of some sort of "spy": http://prntscr.com/wesdwn
Might be too weak, but any suggestions welcome.
A unit being able to give better enchant to itself seems fun. Notice casting an ability, which isn't on the move grid isn't possible in CEO.