B/r Zombies

[Self Medicated]

Ok, so I realize that Zombies isn't a top tier deck right now, but I still see it finish in the top 4 every once in a while. That's beside the point. The point for me is that I think playing Zombies is just plain fun. I recently assembled this B/r list:

[DECK]Lands (23)
4x Blood Crypt
4x Cavern of Souls
4x Dragonskull Summit
4x Rakdos Guildgate
7x Swamp

Creatures (27)
3x Blood Artist
4x Diregraf Ghoul
4x Falkenrath Aristocrat
4x Geralf's Messenger
4x Gravecrawler
4x Knight of Infamy
4x Vampire Nighthawk

Spells (10)
2x Dreadbore
3x Searing Spear
3x Tragic Slip
2x Victim of Night

Sideboard (15)
2x Bonfire of the Damned
2x Olivia Voldaren
3x Pillar of Flame
2x Rakdos Charm
2x Rakdos's Return
2x Slaughter Games
2x Thundermaw Hellkite
[/DECK]

I'm pretty set on the main deck, but could use a bit of help with the SB. In analyzing my local meta, there seems to be a fair amount of
U/W control, reanimator, and then a few gruul aggro and Aristocrats decks mixed in.

Let me know what you think, and let's also have a constructive discussion on how to maximize this deck's potential.

EDIT: Changed it just a little. Took out the high priest from the SB and added in Pillar of Flame. Because of this, I took out a couple swamps and went up to 4 Rakdos Guildgates. This is so I have a few more red sources if I side in Pillar. I also took out one Blood Artist and added in one more Tragic Slip for the glut of Falkenrath Aristocrat and Boros Reckoner in my local meta.