I'm playing a mage right now and i find that all of their spells (especially the ones with a cast time) are delayed,

For example...When i cast a spell like plague bolt, with a 2 second cast time, it takes over .5 seconds to start the cast bar, then the 2 seconds to finish casting, then .5 seconds for the spell to affect the target.

It just feels like the class is playing with extra latency, even though mine is at a constant 60-70ms

I'm playing mage and I dont feel this.

Go harbinger
everything is instant + you're melee + you can solo everything + op

The 0,5 seconds before may be due to starting the cast while moving. The 0.5 seconds after the spell may be because of the spell being a missile? I didnt play mage a lot but plague bolt sounds like a missile spell to me.

not really an idea, maybe this helps

no delay