The problem rn is i have too many things to farm while only having abit ap pot (30+). Not to mention, trivia raid event need to get the summoning mats from standard before u can host the expert mission. I still have sakura x mio event to do. So almost no ap to spare on gemcha, i think i will start doing this gemcha when my ap around 70 (should be at lvl 50 like what sana guide suggested).