RBG FC'ing as a Blood DK. Stack what gem?

[:1]As a Blood DK, what stat should I stack with gems? +20 Mastery +30 Stamina > Resil stacking?

Is there any geared blood dk fc's you could link for my reference? Would be great! Thanks.
Stack Resil, mastery doesn't do anything against casters, and it doesn't do anything stunned, or in any situation where you can't death strike.