i put 14k into tree event, got the new outfit and a few more coins. so its about 11 coupons for 1 coin average meaning hanzo would be over 200 coupons per frag.

tho coins get easier and easier each time you lvl the tree, so if ur able to put in 30k the prices might have dropped enough to be worth using the shop, also i got 5 tendo frags and u can only get them at lvl 5+ so my last 200 pulls giving 5 frags isnt bad.