Does anybody know if Bo-Ris is given to the blood or frost spec coin roll? I know in TOES Shin'ka dropped for the frost spec coin roll and not the blood and for some reason the one handers dropped for blood. Is it still like this or did they fix. Have extra coin roll while doing some of our heroics and just curious.
I would agree when in doubt use Unholy, however that might chance how you get loot in general to something you don't want as Bo-Ris is from all bosses and random, so the chances you get it are kinda low, meaning best way to get it is try on every one of them for it.
However pertaining to your question, it "should" go to both frost and Blood, not sure though.
I coined heroic Bo-Ris, Horror in the Night on my guild's first heroic Tortos kill as unholy, which annoys our blood tank to no end, since he's still using normal mode Bo-Ris, Horror in the Night. Since then I've also managed to coin two Heroic Greatsword of Frozen Hells, once on Qon, and once on Horridon, also while in unholy spec, and on my monk I managed to coin 2 of the random drop 1h agility maces in one day in LFR.