Seeing as how your starting at a cabin altitude of 8,000 feet, I would say both of these are an absolute given.
Pedantic but 35000 feet doesnt give 8000 ft of cabin altitude
Denti,
The left seat taking over controls is indeed a company SOP but with both gens off line during your attempt at a relight, i would think the left seat is the most sensible option to take over the flying unless obviously the right seat not being familiar with his memory items