Board Thread:Question and Answer/@comment-125.165.26.28-20160716142040/@comment-24060202-20160716143529

Cassandra and assitant Lord is not worth building. Snow mage may be useful in early stages only, so you can focus on Griffin first since she can be evolved into a HSR and has a awoken chance of 100% and you can awaken her after you gather the materials from beginner's dungeon. When she is a GSR, you'll find her very useful in battles especially against those archwitches. Rare cards may be used if you don't have SRs.

You can get 3 SRs from normal summon using friendship points :

Cybrog (increase own atk by 300% near defeat, not recommended to build)

High Vampire (increase unit atk by x%, build her, then awaken her if you really don't have other good cards to use.her max GSR skill is increase unit atk by 50%.)

Dragon Princess (atk a single enemy by 200%, well she's useful if you don't have attackers, but Griffin should be enough.)