Akio, I personally believe that there is no such thing as "wasting" any seals in Kage, while it may seem pointless, with GNW and Edo Hashirama, that doesn't mean a pull in Kage is really useless. You could get people you don't have, or people you have...Susasuke's always a great option, you know. :p

Ay's nice, though, some people might disagree with me and my opinions on Ay and Susasuke, but I believe they're both great! There's also some cool Sutachi frags you can get from there too!