So my only issue with this is that the minimum scrolls to reach "Best Deal" is actually 300. I had done the Limited scrolls rebate event (the one where you gain real seals rather than week-long ones) and planned on simply using the 264 to fini* up and get my 300 deal... Unfortunately, despite them being real scrolls none of them counted toward the rebate. I had to do some quick and lucky coupon spending on the Sage Treasure event to not waste my rebate. just a warning to anyone who attempts the same.

Luckily the charm rebate does actually count towards the final score. Minimum required boxes are 89 (I usually just use the last 10 boxes anyway but that is just me)