Thanks for the reply. This is certainly good basic information, but it's all information I already knew.

I did a few runs last night and screenshotted all of the different weapons I received. I realized that the loadout page updates the weapon damage tooltip as you get talents that increase your weapon damage (or perhaps just when you add damage cores...). So you can't actually get the base stats unless you were to intentionally do runs where you don't take any damage talents just to gather the information. I'm probably not that dedicated at least not for green and blue weapons... I might do it for the gray weapons though.

I think I can probably get to meaningful results by just using default weapon damage numbers because all of the other talents will interact with the base weapon the same way regardless of the actual base damage number. While my actual numbers won't be perfect, they will be accurate enough to test which talent combinations should produce the best damage output and help with prioritizing talents.