With tomorrow approaching quickly I have a good idea with what i'm starting with, but love to get other opinions. Out of casters that have a speed spell: Enchanter, air theurg, RM, sorc, am I forgetting one lol? Which one do you think is best or most fun for solo (non buffs) ,small man, running around just causing havoc. Thanks!

IMO, the Runemaster is most fun and has highest utility of the classes you listed. You can successfully spec it in many different ways compared to the others. Sorcerer is a close 2nd as you have high utility and different options for spec lines. Enchanter and Theurg are great in their own rights (and have good pets) but don't come close to the RM or Sorc as far as viability solo and small man options.

This is just my opinion and others probably feel different.

you had the opportunity to try them all for yourself. nobody can tell you, which class will bring you the most joy.

Theurgist. Spamming pets plus you get a mez to help out in solo and small man. Haste buff is nice for your melee friends you group with too.

With sorc you can charme many pet so imo it's the funnier you can have (some pet can insta DD, buff specs, disease, range shoot, stun, etc). And in smallman it's the best choice ofc : aoe mezz, demezz, DD, speed, charm, root etc

But for XP i would choose the theurgist, i xp-ed both in solo and theurg is the easy one.

IMHO when it comes to FUN Sorc beats any other class in this game.