maybe you can try this spec, it gives you the burning blade talent 12-27-4
http://swtor.askmrrobot.com/skills/guardian#11ie8-2ddie2e2e-20
or this
so you have the master focus talent as well 12-25-4
http://swtor.askmrrobot.com/skills/guardian#11ie8-21die2e2e-22