Back to maple, need a little help deciding

So, a couple people mentioned gunslinger, i made one when i played a long time ago, it was weak and slow lvling. Are they quicker to level now? I made one and got to level 17 in an hour, and i could easily deside i want to go for 3rd in a strait shot, but ive heard 3rd for gs is helish, ive also seen people do it in a weak. Im not too intrested in f/p mages, mages are usually not my thing. So, asumming gs are not too slow, where would one train from like 30-70? Those seem to be the worst levels.