On my arcane mage it proceeds through the self buffs, but gets stuck on "Conjure Mana Gem" and continues to try to cast it over and over, but on the WoW window the error message "Spell Not Learned" keeps spamming. I've looked at the common.cs and arcane.cs in Singular, and can only find a mention of that spell in common.cs. It's spelled correctly from what I see, and I can't find a place that shows a spell id, so I don't know if that's the problem or what, but I can't get it to do anything other than trying to cast that spell.
I checked my glyphs and removed the Mana Gem glyph, then tried again, and it started working. I conjured a gem, then went to test out arcane on a dummy. I cast Arcane Power, then Mirror Image, and then I just stand there doing absolutely nothing. Didn't do anything else.
So, seems that mage is busted for the time being until it can be worked on, or at least arcane mage anyway.