Just wait, theres nothing you can get now with 1 draw that will make an immediate impact (unless you're super lucky with SN, and theres a 66% chance that wont happen).
Also, you should only draw during seal events. Sure you might think 1 or 2 rebates dont matter that much, but every little bit adds up particularly for f2p.
Kage's have been around since December. With 3.0 being released this month, I would wait and see at least how things change when Han and company enter the fray, before committing for a 6 month old treasure. If you look at CN fight videos, not much autobarrier kages are used any more with the rise of jinchurikis and better ninjas. (which means that other than the utlity ninjas from kage like mifune and bee, you might not get the best value from this any more - and these guys require synergy with other ninjas too).