Good Tanker units?

[Darmani]

I'm a big fan of Ancient Ents. Typically my first move in battles is to teleport them over and cast Stoneskin on them. If some of the enemy stacks have fire damage, I'll cast Divine Armor instead -- it replaces their 100% Vulnerability with 36% resistance. Oftentimes they can take a full round of hits from the enemy army without dying. I can't use healing on them, but I can use Life Light, which makes this strategy even more awesome for the Land of the Dead. When one of them dies, well, I keep a stack of Thorn Hunters for Sacrifice+Time Back for that purpose.

Yes, the enemy can move away, but the Ents can still use Wasp Swarm, and, if need be, there's Target and Mass Haste.

(By the way, having something low-level enough to use Time Back on in my army allows for major exploits. When I fight an army with a stack that has the No Retaliation ability, I keep it alive, get infinite mana by letting it bang on my Ancient Ents with Magic Spring for a while and get practically infinite rage by using Rage Draining. I then use Sacrifice+Ressurection to get free Thorn Hunters, and, once I've gotten them to full, use Sacrifice +Time Back on them to regenerate all my other stacks. Thus, I turn a heavily-depleted army into a full one for free.)