From your experience, what enemies were seemingly resistant to slag? Not slag damage, but slag debuff.
Just fought constructor from mission "Out of Body Experience." UVHM. I know I wasn't slagging it, because Krieg was not setting himself on fire, even though I have "delusional damage". Which, if I'm not mistaken, is dependent on elemental status effect, and not elemental damage. Correct??
- Saturn - Constructors - Super badass constructors
It may seem that they can be slagged. But the actual things you are applying elemental effect status on are the turrets. After you destroy those, their main body cannot be slagged.
This(slag debuff) is far easier to detect by those who use Krieg and have delusional damage. So to anyone who use Krieg, your contribution would be much appreciated. I have tried google-ing for a list of these enemies, but so far I can't find one.
Strangely enough, slagged bloodwing, CAN be slagged. I'm just not sure if he was taking more damage, but he was definitely being coated with slag. Have to experiment next playthrough, too bad you can't farm bloodwing.