Hybrid Jugg/Guard.
This is my (18/23/0) build.
- You get +3% def from Retaliation/Riposte, and about 3-4k absorbed damage from Force Scream/Blade Storm + set bonus (this is still debated which equations blade storm uses, but it is believed 3-4k absorbed).
- Use Revenge/Courage on Force Scream/Blade Storm and always use when up: Force Scream/Blade Storm, Smash/Force Sweep, Sundering Assualt/Sundering Strike, Ravage/Master Strike. If you are doing it right all those attacks will be free (~1 Rage for Force Scream).
- Then use extra Rage/Focus on Sweeping Slash (even if 1 target), this will help you build up threat. (Obviously use Rage on under 30% ability - Viscious Throw?).
- Never start off with a taunt, try and get your rotation so you only have to taunt when DPS do high burst and pull off you (and obviously taunt on tank swaps).
My Guardian is in all 63's (still need implants and earpieces tho) and has high End Armorings/Mods but high Stat Enhancements (High Shield). End result with exo fortitude stim: 27k HP, 54% armor, 33 Def, 48.5 Shield, 48 Abosrb.
(I've cleared 3/4 NiM EC)