In some however, it looks as though here http://www.youtube.com/watch?v=ic6dKnv3WdU at 4:21, there are some with common points in the tree.
So my question is, do we need to get both perks lower than the one we are aiming for that feed into it, or can we leave one side of the perk tree and climb the other?
I don't mean, can we skip perks - clearly not!
What I mean is: If there is a right-hand branch and a left-hand branch which later meet in a common perk (as can be seen in two-handed), do we need to get all the perks in the right-hand and left-hand branches before getting the higher perk common to both branches? Or can we ignore one of the sides?
Do we know the answer to this?