MBC Version 2 Comment pls

I am stuck on MBC and i think it can be a competative deck. Yes i do play top 3 decks in tournaments like jund, titan and runeflare trap so i do know the meta game, and although everyone will say i need to put in abyssal persecutor, gatekeeper and main deck hexmage i think that it can be done without any of these cards main decked. i guess what i am trying to say is that i am trying to make this deck without creatures. if you like my idea please comment, if you think what i already mentioned then i do agree that any mono black deck would benefit with the above cards, but that isnt the kind of deck i want to try and make competative. i am also thinking about tendrils of corruption over consuming vapors. (what do you guys think)?