I use 2 defensive macros. I call them "Oh Crap! Level ONE" and "Oh crap! Level TWO!"
Level one is:
Thrill of Battle
Vengeance
Convalescense
This is a fantastic macro. You instantly heal 1000+ HP, get higher max HP, take 30% less damage, and are healed for a lot more for several seconds. This is my Diffraction Laser / Cad just hit 6 stacks / I just pulled half the dungeon macro.
Level two is:
Second Wind
Foresight
Featherfoot
Bloodbath
Inner Beast (if up)
This one gives you a minor heal and then stacks a bunch of your little buffs, topping it off with an IB for good measure. This is my GP defense macro, or what I pop if level one in still on CD and I'm getting tagged hard. Follows nicely into Berserk and Overpower spam on large groups of trash.
Aside from that, just always keep Storm's Path up and blow Inner Beast on cooldown.