So far, I was researching all of them. Not a big fan of leaving un-researched stuff, but it seems like a good idea.
Well, I did all of them so far, starting woodelves, so I will skip this first optional one then. It seems only negatives. I over-scout a lot (258 provinces for the 190 required for woodelves), and I always carter provinces. Tournaments, I do auto-fight only (or carter).