Caster weapons vs. damage conversion on regular weapons

Grim Dawn Gameplay Discussion
1

Could not find a thread on this - feel free to point me to existing ones. Otherwise, I’d appreciate if you fine people could share your wisdom.

  1. [li]When do you prefer to use caster weapons instead of converting regular weapons’ physical damage and vice versa, if your build primarily relies on magical weapon damage?[/li][ul]
  2. By caster weapons I do not only refer to scepters and daggers, but also to 2-handed / ranged weapons which have 100% native magical damage (e.g. Nightshade’s Reach, Hagarradian Enforcer, Spectral Arbalest).
    [/ul]
  3. How much conversion do you want to have at least, if you use a regular weapon?
  4. Which other weapon stats (would) make you pick a weapon of the inferior type?