It's a RB deck now! Get with it. You're running enough B cards that your manabase should be able to support any number of ME.
My manabase, for reference:
Lands [25]
1 Arid Mesa
1 Karakas
1 Prismatic Vista
1 Swamp
2 Ancient Tomb
3 Mountain
4 Badlands
4 Bloodstained Mire
4 Cavern of Souls
4 Wasteland