A Whitesmith with a Bxxx Mjol that can't mob because I'll lag-out and die, so I have to stand and wait for the Lightning Jolt to proc.
What? You lag making a mob but you dont lag when the Lightning thing procs? I would say that the lightning makes lag worse, and since its being spammed its annoying.
If you go with a reflecting piece of gear (HO shield, pirate dagger, devi valk mant, others) you will keep spaming LSoD even after the mob is dead since the disguises are immune to it.
But given the choices you've provided, smith is better. I dont even see any advantage on using a LK, specially a two handed one, yeah you will have parry, but still you can die pretty easily without a shield, dont have the easiness of greed and the sucubi/incubi also have big defence lol.
Given your choices and map to use, i would say, use a priest and carry a smith just to greed, its the easiest way lol.