In this event i usually never spent coupons and always get those 70 free medium level refines, but this event i saw the crazy drop rate of tendo so i gave it a try(ofc didn't get him) and now i will have in the end about 1800-2000 points, so i was wondering since the cost of charms is lower then on last event (dice) would it be better to go for them or continue to stack up medium refines?