I run it in a Trostani Selesnya's Voice life gain and it works wonders. When I play it, either I win, a board wipe gets played, or it is destroyed. Besides, it is best used in either tokens or a deck that deals damage to itself.
Looks good, I just have one card I think could help. Conduit Of Ruin It tutors for your finishers, makes your finishers cheaper, and is a decent body to have on the field. Besides that, your idea looks cool.
From my view point, your argument is one of those yes but no situations. My playgroup has pulled some nifty tricks when it comes to color pie issues. Red has situational enchantment removal with chaos warp. Black can answer artifacts with disposes. Green can beat storm by using weather the storm. My own blue decks has infinite reflections to answer anti blue cards. White also has ways to draw cards, my personal favorite being mentor of the meek. The color pie is a key concept for magic, but if you look hard enough, you can see where the color pie breaks down in some interesting ways.
1. Dark Ritual
2. Demonic Tutor
3. Thoughtseize
4. Hypnotic Specter
5. Hymn To Tourach
6. Royal Assassin
7. Duress
8. Reanimate
9. Phyrexian Obliterator
10. Animate Dead
11. Hero's Downfall
12. Drain Life
13. Vampire Nighthawk
14. Liliana, The Last Hope
15. Dictate Of Erebos
16. Grey, Merchant of Asphodel
17. Geralf's Messanger
18. Gravepact
19. Damnation
20. Vicious Rumors