Maybe it would be for the best if we skipped/fast forwarded through the current encounter, those no longer with us opt to return to town (Injured - not dead so that if the players come back they can always hop in) and the remainder presses onwards?
Actually I was waiting on an answer from Tenshi which he gave to me last night I will be replying shortly because of it, sorry for the delay but all my books got destroyed when my computer had to be reset.
For that character, he can craft an item which allows him to know spells he does not already know, there are amulets which can change or enhance his sorcerous bloodlines, and of course, upgrading what is already there. But yeah I am not forcing anything when/if you do need something let him know.