if you aren't an heavy p2w going for power is the only way you have to stay competitive with them.

You'll eventually get good ninjas out of gathering scrolls and out of luck in events (or by buying fragments 1 by 1 during 5-6 events), but if you miss power you aren't able to do anything.

564 advanced refinements?

Are you sure you didn't swap medium and advanced?

Anyways if you really have so many you could try to bring one of your gold equipment items from level 4 to 10 when you reach around 1000 advanced, or 5 items from 4 to 8 when there's the rebate on, but you miss some medium refinements for it.

what you should do, as i told you, is to look at which item you have the luck to get a gold initiative purification on your 1st prompt move ninja. At that point, when there's the refinement rebate and time limited rebate on (and only at that time) you bring that item directly from level 4-5 to 8. After you have done so you purifiy the other 4 items in prompt move 1 to get an high purple or gold purification for initiative and you redo the same thing for those items.

Remember to NEVER bring an item from level 6 to 7 before your 1st prompt move is full of level 8+ refinements.

If you see in average that you get more advanced refinements than mediums then stock up around 1000 of them and bring one of those level 8 refiments in move 1 to 10 directly.

From the packs always get advanced refiments. You can buy mediums from monthly activity and from group shop (and you should do it as your top priority in that shop, about the monthly event you should do it after your BA reached rank 6, before you should just buy medium threads there).