level areas like monastery of silence, in pvp against parties that exp at sacred attack weak point mobs (they most likely have holy weapon buffed), and in pvp against a spellsinger as their over hit and light vortex are both considered holy attacks.
holy weapon makes your weapon damage type sacred (while still being subject to pdef in terms of dmg reduction)
This is the reason holy weapon and the bd dance doesnt stack, as they both just make the weapon sacred, not add a % damage onto it (they stack but its no added effect)
Right... but, I say again, PCs are not weak vs Sacred attacks... thus making the Holy Resistence spell pointless in PvP... which was the only point I was making.