Yeh I got confused on this one, I was going for 15k but then grinding day after day is so nasty. So I ended up with 10k+ Ive continued onto a a 0 gap now til level 32 and have used approxiamately 5-7k sp with all lightning, all force (healing), some sword, some spear and some ice lol. (bit messsed up but im working on it).
And Ive gained about 2-3 k while doing so on a 0 gap,
Just letn you know the approx numbers you could be looking at due to the fact that while the cap is still in place, the need for sp isnt totally high at the moment, so you have to estimate yourself on how much you want.
The korean players suggest 30k apparently for all needs, though because grinding is so nasty, i suggest just gain at most 5k and continue tryin to have fun in the game.
PRIDE!!! and PLUR