The MAJOR debate over Holy Arrow

Clerics are made for partying with other classes and leeching exp. From Private Server experiance it takes almost 3 times as long to get a Cleric to level 200 than it does any other class - even those without mob skills such as Genesis.

I have no clue what you're talking about. Currently the best monsters in the game in terms of XP are holy weak -- Skeletaurs. With a good lvl Genesis, you'll level very fast; actually all mages lvl fast. But Bishops have a strong attack without Amplifier, so they use less pots.

As for Holy Arrow, it's worthless. If you max all other 2nd job skills you'll have lvl 11 holy arrow. Those other skills have more of a long-term impact than Holy Arrow will. When you are training on strong undead monsters, Heal is a better attacking skill because it hits a lot of monsters and often lets you train without MG. MP Eater becomes worthless later on. But when I was training at Hoodoos and Voodoos, MP Eater allowed me to train completely without potions, which I liked.