[The Rock-man]

Not bad but you should put a point or 2 in Calculated Strike (+45% damage on the odd hit is better than nothing it also boosts your shield attack damages). Concussive Blow is next to useless its just 5% chance to stun and increased stun duration, (1 point makes your Lethal Strike your best stun go from 3 to 3.3 secs) you be better of dropping this and putting a point else where.
I personally would put more points in Inspiration for the improved duration on Rally. Also Batter + rend armor at lest one point is each to enable you to spread the poison over 3 target at will.