I hadn't realized there were different kinds of ambushes. I see onslaught is damage focused. Can you explain further about savages and ambush bonuses? Do you mean simply that all savages get bonus damage when doing an onslaught ambush (when not wearing metal)?

You can have metal in your inventory without suffering a penalty, correct?

What skills key off empty slots (and which empty slots)?

Lastly, how hard is it for druids to convert stuff to wood-- I mean, are you asking a lot of them or is it a minor favor?