If your running this many mana artifacts I wouldnt think manabarbs and maybe land destruction over dealing damage. In a sense your tapping lands to play lands, which isnt cool with Barbs. Something like Lotus Cobra would be a bit easier on your life total and could synergize well with Pariah. Assemble the Legion is a big investment, doesnt excite me too much here but could be a game changer in a Soul Sister's type deck? Even some defender ramp type thing would be really helpful and would allow you to to play be x spells like Aurelia's Fury/ Savage Twister/ Clan Defiance