Vulnerable is a terrible system just like Slag was in Borderlands 2. There’s a reason why Slag was never seen again in any of the sequels. We need a band-aid until Vulnerable can be overhauled or just outright removed.
I’ve been mainlining Barb since launch. I push T70+ NM with an off-meta build but I have 100% up-time on Vulnerable and I still hate it. I feel bad for all those Sorcs that want to do anything other than Ice Shards and Frost Nova; or any Necro that isn’t Bone; or Barrage Rogues. Heck, I tried to make a Lightning Sorc work with different combinations of Frostburn and Biting Cold but it still feels terrible compared to my Barb who can turn every minion of Hell into Tinky-Winky from the Teletubbies just by breathing on them. You’ve cut potentially good builds off at the knees because they don’t have easy access to a 400% damage multiplier.
Vulnerable. It’s bad. You know it’s bad. I know you know you it’s bad. The only people who don’t know that it’s bad have an IQ equal to the boiling point of water, in °C.
Ideally, you remove Vulnerable or it’s damage multiplier entirely but we all know that isn’t happening anytime soon. The fastest and easiest solution is just give it to everyone and suddenly every class has a dozen viable end-game builds.
Except for Sorcs, because they still don’t have any armor, sorry guys.