scaling damage in poe1 vs poe2

im a new player currently lvl 53 playing a strength stacking jugg, and im looking for ways to scale damage, from what i played in poe2 most attack based builds owe majority of their damage to the weapon with the tree being a secondary source of scaling is that the same for poe1 or is it a split between the tree and the weapon, also is there a way to get armour applies to ele on the tree? or does it only come from gear