[@BioHazard]
Your sheet's good except for the magic section, as [@Obscene Symphony] mentioned.

Being a Caster-class character, the magic becomes much more important to the characters fighting style and capabilities, so we'll just need you to write a quick description on the kinds of things he can accomplish (think techniques, I suppose), keeping in mind that -- as all our characters are new to soul-linking -- his magic will be relatively weak and simple to begin with.

Also know that you aren't locking yourself into whatever you write down, as Silas+Nostradamus can and will learn other ways to use their magic as the roleplay goes on. The new ways they find will also be up to you, of course.

Edit:
Oh, and while this is definitely not something you have to do, I would suggest maybe going with Decay/Healing as you mentioned earlier, and dropping Illusion, seeing as we have 3 others characters who also heavily use Illusion.