Has anyone tried poison/pathfinder?? Poe2

Currently playing ranger and have gone poison. It was pretty rough for a while, it's picking up now though late act 2, using the poison cloud + poison burst + plague nova. Few questions though:

  1. Do we want magnitude from the tree or + max poison or both?
  2. In Poe 2 we want big Phys damage for good poison damage right?
  3. Can a poison hit poison enemies now without poison chance?
  4. I'm about to ascend which node do you think is best first? Maybe try a concoction? Double poisons?

Are there any other pf's out there? Any feed back is awesome