1: Ghost arms would need to mention replacement as they're incorporeal.
2: Sources for those?
Flee the Scene, Nightmares made Real, and the Scorching Wind (With draconic) also off the top of my head, which is why I brought it up as being better in homebrew games.
Additionally it boosts the cl of your 24 hour buffs, giving you some dispell protection, and lets you take 23 on out of combat dispells.