I applaud the original guy that did this for doing something creative and awesome. For Kara runs, 5 mans, and things you have under control, that might be nice. For everyone hoping and dreaming about tanking Illidan as a moonkin...
Mitigation: Yup, same armor as a feral, but...
Someone pointed it out in his thread, the small problem that you cannot dodge, block or parry (though all we have is dodge anyway) while casting. I'm sure anyone looking around has seen the amazing amount of avoidance warriors and paladins need, and the dodge rate druids need.
So, we go from 25% Dodge from Karazhan to 30, 40 50% (I've seen that number batted around, 50% dodge seems absolutely crazy to me, can someone confirm this?) later, and reduce that down to 0. Whoo boy, somehow I can't help but feel that is going to give you a rather insane increase in damage taken, and a much smaller HP pool to survive it with.
Threat: You have a 70% resistance to pushback, but it is only 70%. You will still get pushback. If this happens several times in a row (30% chance? Oh yea, I've gone entire battles going "WHY CAN'T I DODGE?!", so it can happen in rapid succession), your DPS will pull hate. This is especially true with multiple mobs beating on you. He mentions using Cyclone to control adds, but that is even more time spent not putting threat on the main target. Not an issue if everything is CC'd, but some pulls simply don't allow for that.
If you lose hate, you can: Shift to bear, taunt...And hope the situation improves as you try to get back to what you were doing, or barkskin (1 global cooldown), and cast to get hate back, or just spam moonfire to try to pull it back. Personally I would be rather terrified for my life as a non-rogue (blargh at your Vanish! :P) melee dps in that group.
Mana: Self innervate is nice, you do regen on hit...But the hit timing seems pretty controlled, and even then he mentioned "regeneration periods". So unless you've created a pretty huge threat barrier between yourself and everyone else, all your DPS now have to reign back considerably.
Really it all goes down 1 thing in the end. Your group can have a tank with high mitigation that can reduce the load on the healers considerably, while putting out a consistant threat load, or you can have a tank with odd cycles, no mitigation outside of armor...You get the point.
Disclaimer: I'm nowhere near Illidan, this is all just general theory.
Edit: Aahahaha, Jee posted just before this. But it was already up here when I posted...
Edited, Dec 10th 2007 4:12pm by Riftaru