what is the hardest race/class combo for a new player with no guild/friends on R99

[Salem Orchid]

Anything shadowknight might take a while to grind but it's not hard by any means. During classic i leveled a shadowknight through the 20's and 30's in South Karana, I would just snare something put my pet on it then literally AFK auto run up the east wall, come back in a couple minutes and re apply then AFK again running back down.