Thunderdome
Emperor
That's probably one that Inno would not go with since they will probably scream "DNSL".an elite unit, which is a slightly stronger version of the players age units.
This, however, might prevent them from screaming such... if they are going to consider it.Elite units cannot be manually healed or restored with diamonds. They can only heal over time.
Your further explanation of your idea has me wanting to see it in action. But, we all know that if it does get considered by Inno that it will take a serious nose dive if they made a mess of it.
And, I think I broke the PVP Arena because I ran out of opponents to fight that I am fighting repeats. And, good GOD, I know there are more out there!