Jumping in with a few comments :
1) Events and storylines from novels are canon. Smaller, specific details from them may not be (The dwarf who goblinized in Shadowboxer, for example). Also, NEVER try and interpret game rules from the novels. Just the way it works.
2) Wolf was, effectively, a combination Physical Adept and Shaman. Stackpoles stories were written while the game was still being worked on and defined. To my mind, Wolf is what I've long called a Shamanic Adept, a Phys Ad that follows a totem, and manifests a "Mask" when he activates his adept powers. One of these days, I'll get around to writing rules for this up (Or talk Rusty into it, since he's such a big Adept fan)
3) Bull the Ork Decker has a major beef with Harley. but lets face it, at the end of the day, the worst Bull can do to the elf is ruin his credit rating. Bull knows Harley is very powerful and can do magic that most mages can't do, but doesn't really know anything about his immortal status. Sure, Bull might catch Harley by surprise, but if the Immortal Elves don't have a crapload of anchored spells on them to protect themselves, they'd have been killed off long ago. And an Anchored Force 20 Barrier with a "Detect Bullet" type spell attached to it will stop even Bull's beloved PAC.
Bull the Writer, on the other hand, loves to hate Harley, and would hate it if he was really dead. I love to hate the little blighter. though if Harley started posting to Jackpoint, I bet Slamm-0! would love it, since it would redirect the ork a little, and he wouldn't get picked on so much

(I don't know, I find it so much fun to have Bull and Slammy sniping at each other. I'm hoping one of these days that we'll find a place for Slamm-0! to get revenge on Bull for dumpshocking his ass in Street Legends

Bull