wizard lvl faster solo or grouping?
 

I know wizards aren't very good in groups, but I'd say most of the time I'm able to find a group in the popular zones.

Generally speaking, is it faster to group or solo?

Depends on level?

10-20?
30-40?
40-50?
50-60?

From whenever wizards are able to effectively quad kite I would doubt very much any group exp could realistically keep up

More or less accurate (too many factors), from fastest to slowest :
A. Solo quadkite with POTG/C2
B. Solo mono-mob with POTG/C2
C. Duo
D. Balanced Group of 4 people.
E. Solo quadkite without POTG/C2
F. Solo mono-mob without POTG/C2
G. Full Group

You missed out AAAAA; having a bard snare kite over you with 25 mobs and dropping PBAoE on them. You can team up with clerics and other classes to do this (even necromancers) or swap out the snare bard for some enchanters spamming AoE stun.

I feel like full groups are almost never faster than soloing for any class that can solo decently well.

Duo and trio is where the real exp is at.

On my wizard, I usually get around 6% pr hour quad kiting with no PotG or C2 at lvl 57.

Duo with a bard and rain death on swarms.

EQ is not about fast leveling. Join a group, talk to people, enjoy the ride.

Just do a mix of everything.

But yeah, find bard friends if you have the need for speed.

Not sure what mono mob you could kill for more exp than quadding without PotG. Same with a group vs quadding with PotG