I think Deathwing is clad in Elementium and not Adamantium plates. I think you need to change to that. Cool concept btw.

Thank you very much for your time to make a comprehensive feedback kind Sir. - for the mana costs I made it low since he will be spamming Q and W all game so he will have significant energy drain especially if he specs for a full Shadow dart kiting/poking build. But I think I'll tweak it to be a bit higher as you have suggested. *P.S. I had a typo on the energy per level it should be the usual +10 per level and not +100. Sorry for the confusion. - for Rak'shir if neither of you die...