Roshi will still be valiable after the release of GNW Treasure , so pull him now don't worry. And save seal scrolls for GNW Treasure after that , which will probably come out late february or early march. So you have time to save some seal scrolls. Just for your info : for 10 seals from that treasure you could pull Edo Mu , Edo Haku , Kinkaku , Sage Kabuto all of those ninjas who cost now 40-60 seals or are expenssive in the shops and events will be very cheap in that treasure. Other ninjas for 10 scrolls are Toroi , GNW Hinata , GNW Sakura , GNW Ino , GNW Tenten , Shikamaru's dad , Ino's dad , one of the 7 ninja swordsmen the one with Samehada , Pakura the scorch style user from the hidden sand with the green hair. So as you can see a lot of ninjas for 10 scrolls in that treasure. For 60 scrolls you could pull : Edo Sasori , Zetsu , Edo Zabuza and the other 5 remaining swordsmen of the mist. And for 900-1000 seal scrolls you could pull Madara or Naruto Kurama mode. And for every 50-60 pulls 1-2 edo hashi frags , just like Susano'o Itachi is now.