One word: Cow.
Get cows...they rock your nuts off. There are a LOT of them to get too, and in a Solo game, you can wipe out 50 of so in a minute...so it's easy to get a ton of them. At that point, getting hit is almost out of the question...there are just too many guys on the screen. Of course, Cows are pretty crappy revives for...ya know...killing stuff. If you have Enigma then they can be useful, but like the dudes above me said...ranged attackers rock.
In particular, Skeleton Archers, Dark Archers, Skeleton Magi, Spear Cats. They're all good. Also, Spectres. They're Physical immune, making them pretty much automatically awesome Tanks. They can STACK ON EACH OTHER, meaning they won't get stuck behind other minions, and they can move over open space. All in all, pretty awesome revives...