Transform Combat Readiness into Master of Combat giving more base damage reduction while maintaining the increasing damage reduction gained when getting hit while also decreasing your damage done and increasing threat generated. in addition transform killing spree into Bladed Shield absorbing a large amount of physical damage based on you agility and possibly dealing a small amount of high threat physical damage . this RE would also increase the effectiveness of the Combat Potency capstone effect in order to maintain this tank buff. make this buff unusable in all tank stances.
I didn't want to include numbers because obvious balance changes that this RE would need. maybe the shield could be smaller as well and increase while ghostly strike is active like the epic RE In The Zone. Sorry if this is very disorganized I just wanted to get my idea for a rogue tank out. the whole goal would be to have a dual wielding shield making tank.