Enob
Golden Knight of the Realm
- 413
- 112
As the difficult fights get longer, I've never regretted high rank 4* summons. I have R5 Maduin and R5 Valefor and bring them on a summoner to every magic based fight. They out-DPS any other 4 star ability by a large margin. Bahamut isn't very useful until R3, and much better at R4, but the material requirement is immense. Saint's Cross is similar. Needs R3 to really be usable. I'd recommend to keep banking orbs until you need it for a fight and have enough banked to hone it to useful levels. If you need some R4-R5 4* abilities to beat difficult fights go for it. If not, save up for universally useful things like R3 Full Break, R3 Saint's Cross, R3 Bahamut, etc.