I suggest that some of the Dark monsters be changed to Holy weak so that Priests have a little bit more variety in farming locations.
This change could affect any of the following: Dark Wyvern, Dark Cornian, Dark Rash, and Dark Drake (There is also Dark Stump and Dark Axe Stump which are Fire weak obviously cause they're stumps)
The Red Wyvern is weak to ice, Blue Wyvern weak to fire, but Dark Wyvern weak to nothing ???
Also, some mobs that have the prefix "Dark" are already holy weak, including: Dark Leatty, Dark Nependeath, Dark Pepe, Dark Jr. Yeti, Dark Yeti, Dark Yeti & Pepe, Dark Stone Golem, and Dark Cloud Fox (this is also lightning weak)
In addition, this change probably wouldn't impact the health of the game overall much at all. Priests would still have to use potions to train at these locations, where we don't need potions at all at undead. The tradeoff would be to look for different drops than our usual mobs, or to party with friends training there as well.
Thanks for your time,
Rykbi
Lvl 119 Priest