Well iv been thinking about it aswell.. Im lvl 86 tyrr and have apo weapons..(pole and slasher)
From the PVE aspect i know:
Dark and earth are not good at all...
Not sure about holy
Atleast swamp mobs have wind resists and mby some more...
Fairy mobs have dark and water resists...
So as i see holy and fire are the way to go.
In PVP, mostly dark/earth/wind should be avoided. Not so sure about the holy and water part, but i think water would be better pick, because ppl now have probably more holy defense duo archers. Not sure on that one...
there are no mobs with holy resist anywhere in the 85+ spots (soa,harnak,gog,orbis,eg,hellfire) meanwhile there are mobs that have all other resists spread on the spots i mentioned above.