Beautiful, absolutely beautiful
Sadly, I see a few problems.
Problem 1, if you manage to get 2 belts of the victor, this will be 1/1mil games. One will be lucky if he/she can complete 1 of those
2nd problem - no easy resurrections. Most of the units can only be recovered by time back, others - with resurrection spell. Pretty mana consuming. 3rd problem - Gremlion, K'Tahu and Baal. This army has overbuffed damage but few protections. You may be hard pressed to switch lineups for these battles.
On the other hand, vs. Regular armies and heroes, this army will simply steamroll everything on the battlefield
it will be a lot of fun to play it. Slap 2 types of fairies in reserve to swap 2 of the troops and you have a real carnage. 2 types of Fairies + Max crit from items + Agvares + fixed damage from items = Cannot be described - WOW ZOMG LOL ROFL LMAO is an understatement.