Minor nitpick: Subtle Magic isn't valid for Jerbiton's House Virtue, but Educated is.
I think Belisarius isn't able to learn Touch of Ymir due to Short-Ranged Magic, unless I'm missing something (your ReAq lab total is 18, you'd need a 20).
I can't locate a source for Touch of Ymir, Breath of the Impenetrable Fog, The Foggy Labyrinth and Shriek of the Impending Assault. Are they custom? If so, they should be validated first. Except for Shriek of the Impending Assault, the other ones seem a bit off.
This bit might be more critical:
You have a lot of concentration spells. I think you are planning on using Maintaining the Demanding Spell to sustain them during battle? Are you perhaps counting on fast-casting it while in combat? We had a recent discussion about fast-casting that started here, but I don't think we have formally settled for a position. If your concept hinges on heavy usage of fast-casting, maybe we should bump the discussion up once more.