Vulnerabilities Bugged?

[YulRun 6]

More or less speaking towards Fire Vulnerabilities. I'm a Human Wizard and every time i find a monster that has Fire vulnerability I'm like sweet this should be easy to kill, but half the time i attack them with Blaze I do the same if not less damage then the other mobs near him.

Is this bugged?

[Africa 81]

Missing information, which mob are you talking about? how much hp does the vulnerability mob have compared to the other one?

[YulRun 6]

HP not really a factor, I'm not judging my damage based on how far his HP bar drops but by my actual damage to the mob. But just as an example

https://l2wiki.com/classic/Mandragora_Blossom   is Fire weak, but I will hit it for the same damage as a Specter, not Fire weak.
https://l2wiki.com/classic/Specter 

[San0 2419]

mandragona has higher m def. either way element vulnerability and resists are quite week on this client, beeing it 3% or something like this i think

so considering the chars damage is also lowish, u wont find much diference in the weakness monsters against a element.