MTG Salvation

I actually put Signets in my hybrid section too, I think it makes a lot of sense based on how they end up getting used.

Here's some cards you didn't mention which I think are worth looking at:

Bedeck - Reasonable hybrid removal spell.
Saheeli, Sublime Artificer - This is just good.
Deathrite Shaman - Niche but can be good in some cubes.
Sygg, River Cutthroat - Seems fun.