New here.
 

What is fastest class to solo level? Are there group exp bonus's here. Thinking druid/wiz/necro/mage. Thanks!

Go necro.

Necro is kinda safe and has many options, but it takes some time to master. Go mage if you want it easier. Just let good old fire ele tank. If you don't want the pet xp penalty, get yourself a 2 man group or kill pet every mob. I would go for 2 man group, best get another mage or maybe necro :)