took me 3 months fishing (with skillup rings) everyday to go from 100 to 110. but I've also heard others that went from 100 to 110 in under 2 weeks as well so to each their own. You missed the skillup boost campaign they just did 2 months ago. But now with the skillup tomes you can buy from RoE, would have been a cakewalk to skillup. [cost 200 spark per tome and you can only buy 1 tome at a time until they do the fix this/next month but it beats having to fish and pray to the skillup god]

Depending on what your fishing level is at, Qufim is probably a much better place to fish up Black Sole [plus there's always the occasional thunder element that pops near the fishing spots for cluster if you need that to skillup clothing].