+tree items and synergies

[adeyke]

If I'm not mistaken, Valk also gains the +skill bonuses for Dodge, Avoid and Evade.

No. All the Valk's synergies are just based on the base points. None of them benefit from +skills.

(and items that have +skill without the specific class mentioned like on scepters, etc.)

Items with oskills don't give synergies. It's only the items with charges that are affected. More specifically, the items that are affected are those that have charges of a skill that you don't have points in but which would synergize a skill that you do use. Many items with charges fail these criteria.