[X] Enchantment, as skilled as you may be in mundane crafting you will eventually strike the limits of what matter alone can provide so why not learn the weaving of spirit into substance?
[X] Healing, one of the most demanding and complex fields of magic as well as one in which Bob has limited experience, but if you can master this it might be a boon beyond price in battle alongside allies less tough than yourself
[X] Shadowcasting, you already have an affinity for shadows, drawn as it might be from a fell place, being able to invoke the dark more readily would be of use in battle and out of it
[X] Summoning, warding and binding, selling this one to Harry will probably be the hardest...but if you can though. You remember all too well the fear and awe saw reflected in the gaze of the Pathfinder 'nurse' and of vampires subtle and overt, a useful thing in negotiating even with dark spirits more powerful than your electronic friends (Requires additional Persuasion rolls)