46 pulls for a guaranteed sage naruto?
you sure? hope this isn't your first 60...
if you haven't gotten the others...you might not get sage naruto...

Example: I got Ao and my buddy got Sage Naruto in the first 60 draws/pulls :D

Also...it's up to you...if it's all about seal scrolls...they usually have those on sale during events but you usually also have to buy 5 or 10+you get bonus ninja frags and sometimes a chance at an 80frag ninja.

They had Traitor Orochimaru in the last one I believe.

I would recommend you save up...but overall this ends up your choice. There may be better events...and probably will be in the future...but we don't know if Christmas will have those "better events" or new years...or the Chinese new year(if they do that in this game) lol or maybe not till late January~

Anyways...if you're sure you want Sage Naruto...and he's guaranteed by what you say....then check how many seals you have...if you can buy a few and have enough...then maybe you SHOULD go for it.
If not then there's no harm in saving up the coupons and waiting right?