i have a lvl 42 stone/inv at guardian which i try to get him to optimum dam rez for both pve and pvp. so here it is
temp inv, res damage, unyielding, tough, res energ, res elem:
all 5 slotted with lvl 45 dam inventions (generic type) for 62.1% dam rez for each one.
unyielding is slotted 5 dam +1 steadfast protection (unique) for a 3% def overall bonus (kinda mitigates the unyielding penalty).
Remember also that inv is a primarily for smash lethal damRez so the extra 2.1 you get from so much slotting X 5 powers are an extra 8.4% dam rez.
another thing that i tried is to slot all my attacks with 2 pounding impacts IO's which give you 8% regen (with my 5 attacks including brawl and box those amount to 40% regen.) plus 2 numinas on dull pain, heal and self aid (another 36%) thats a nice 76% regen to compliment my build.
