Hello am lvl 62 xbow and I always played with gap 0 - maybe 1 sometimes. Now I can't upgrade half of my skills and that's just driving me insane

I've read MANY guides on how to powerlevel on ongs/sonars-penons ... and right now am just too high lvl for this.
I found sun drop a few levels back and I have enough money to buy powerlvling or good equipment ... I also have gold ticket.
My question is, where and how to farm really fast with xbow ... is it worth go gap 8/9 ? Or should I farm sp at 90 ?
Thanks for help.