9tails- 1hit, you get minimal reward which is 10cp and lv2 mangatama. But you propably should reconsider doing ninja exams- doing lv200 gives around 60x lv1 last time i counted. Thats little over 2x lv4 for free daily.

Is it really worth it though? Unless you are top1, maybe top2 during every swb you miss out on more item value than you get from 3rd rank swb. If OP is f2p, freezing level makes no sense at all to me, since he/she wont be able to compete with spenders anyway, and every sage bracket has their top. And restricting your level pretty much only influences your swb bracket- matsurii and bonds are still random.

Also regarding froggy, it might be better to skip them (i assume refine and seal ones) and pick ninja exam rewards instead.