Imo, it should have at least 6 HP so that its out of the range of 1 hit CC and the mechanic becomes more interesting.
Also, I think making it an earth skill could be cool. Trolls are kinda earthy in my mind.
However, its basically an archangel with a skill nerf and hp/attack/unupped quality buff, I'm not sure I would like to see it in the game.