id say balance refines until they are lvl 7, cave keys, bells (get at least lvl 30 across pos.1), and myoboku (dont prioritize after lvl 8 for all maps). Remember to always use rebates when spending those things (refine rebate, and cave key rebate). refines are lvl 7, and myoboku is lvl 8, u want to use nearly everything on cave keys. U need at least 1050 of them every rebate (once a month give or take a week), to get ultimate essence. If u are going to be competitive, go for 2100 cave keys every rebate, using moon only on cave keys, and using cpns to fill the gap to get 2100 every rebate.

So basically get lvl 7 refines bells myboku lvl 8 then after spend all in cave keys

Yup, get medium refines until done, balance with getting 1050 cave keys everytime the rebate comes. Once you are done with medium refines, balance it with getting bells and chimes, then balance with getting myoboku items.

Also throw in the clothing and the unbound runes to get up chase damage and some power. But just make sure you have 1050 keys everytime for the ultimate essence from cave exploration rebate jackpot.