Hi!
1. I personally would farm crafting and awaken materials whenever I can, unless events require me to do otherwise. So sometimes you need the stamina for Monthly event that requires you to do elite, but for the most part I would try to farm awaken/crafting material. Very useful in the long run!
2. I recommend saving your seal scrolls for Kage Treasure or Reanimated Treasure. Pains used to be very good but it has since become a little obsolete. Go for more relevant ninja or save for new treasures!

Hope that helped =p

~Jib