Yes this has bothered me for a long time, I believe, but I forget where the game mentions that you can repair them. They are NOT buildings but can be repaired by greek villies or are supposed to. They aren't affected by building upgrades, I'm not sure why but I think armory weapon upgrades affect them even though they are not humans, ships or buildings. They are only archers and units, and affected by anything that affects archers, techs, relics, everything.
Carnivoras are myth units. Sentinals are non-human archers.
Btw though, I knew about most of these things before, but happened to come accross them again in the proto. I only look in the proto when I make scenarios, looking at specific things. I also use it to prove points though.
I usually find something and verify it's valid in the proto. I've had access to it and looked at it for a long time. And just so you know this is my second thread that's even similar, so I don't get how I've created so many threads about it.
[This message has been edited by L33TSkillz (edited 02-12-2010 @ 09:55 PM).]