Personally I'd not like the TBN duration extended, I enjoy the clutch aspect.

However, you need to be more rewarded for a proc. A small heal for 5% (OT) 10%(Self) of the dmg blocked would be excellent.

Also, make the cast for TBN, Sole Survivor and Living Dead instant but keep the animation intact. Give Foresight Shadowskin animation and maybe, maybe make Dark Mind an AoE buff for half effectiveness for non self.