by Shmooglavoue » Mon Sep 14, 2015 5:42 am
From what I understand, priest is the only majorly varying class/race combo, since different priest races get some different spells. Fear ward for dwarves being arguably the most important.
Besides that, the other racials seem to have more effect in pvp than pve, namely ones like the undead's will of the forsaken, orc's hardiness, gnome's escape artist, dwarf's stoneskin etc. They each can be really good in the right situation, or irrelevant in others.
The other PVE racials only have a small effect in raids. Like, a percent or two of an effect (in your own performance, which is then spread out across 20 or 40 people). If you want to min-max then they're worth considering, but the chances of a few percent more damage changing the whole fight are pretty low. The chances of a racial consistently being the defining factor in a raid is close to nil.