The MAJOR debate over Holy Arrow

But, to me, HA is just more fun. If I heal-spam on my other cleric, I play for about 45 minutes at most before getting bored - and that character will probably never make 3rd job. With HA, I can go for hours, and I estimate I'll outlevel my other cleric (36/49 atm) within the month, and that's with leeching a HB-mule, just because I'm having fun.

Maybe you should consider playing a Cleric/Priest at all... all their jobs are about standing around spamming 1 mob skill. They never get a good single target attack like certain other classes (thieves, warriors, bowmen) do, and at most you'll be switching between SR and Heal depending if your party needs more HP or not.