[beartronical]

I would say d'addario all the way.
lemon oil is what i have used for a long time on all of my necks, (ebony and rosewood)
I guess maybe one thing you should ask is what gauge of string he is putting on there, that will be a preference thing for you, I personally prefer middle ground string thichkness because i detune a lot.

but certainly you should ask the tech what he thinks, if he is doing it for you.