Talk:Rulbell (Evil God of Shadows)/@comment-25235299-20140817043943/@comment-25240848-20140818082714

For late/end-game material(certain 5-star quests and Demonic/Divine Blader) you will need a shield or risk party wipe. Rulbell is the very rare kind of spirit because all-shields are only found in SIX other spirits all of which were limited and an all-shield user may only show up once every other month or so. The heal/all-shield skill combo makes her really desirable especially for those who do not invoke Fu Fey back in late March.

General rule of thumb: If you get an A rank or above spirit and you haven't reinvoked yet unless you have another copy of that is near/fully unlocked keep it. This is especially true for limited spirits. You can use it at a later date or use if it's a duplicate use it to unlock a hidden power.

There are three different delayers  (Greed, Prospere, and Riverta) in the permanent invoke pool. You can get them at absolutely any time while you don't have that luxury for limited spirits and especially those with rare or unique abilities.

TL;DR You should've kept Rulbell and you may not know it or feel like it now but you will probably regret this decision down the road as you play the game.