so, I am sure some of you already know but some people probably don't. To easily get the so much blood achievement (gunzerk for 90 seconds straight) have someone do the flesh stick grind with you. You play as the gunzerker and gunzerk on flesh stick while the other player keeps spawning him. Achievement done.
It might be old news, but while power leveling it dawned on me to try this out so to me its news, figured there would be someone else out there who didn't know either. --- "We live in a world of give and take, but not enough men are willing to give what it takes"