I tried both variants and I see why Barnes is not included, you can drop it 1 turn earlier but it is less consistent than bully, so I ended up running 2 bullies. Not sure about “-1 Counterspell
+1 Mana bind” replacement, counterspell can save your board vs brawl/consecrate/flamestrike etc., and mana bind most of the time just gives you 0 mana spell at the cost of the board advantage