It's a good class IF you have the patience to set it up. At low levels, you're low-to-mid range in terms of damage (especially before you can upgrade and imbue your weapon(s)), and mid-range in terms of survivability. Once you've upgraded and imbued your weapons and started investing in Nostrum, the gold starts to roll in. Hybros is so rich and strong because he patiently worked for it.
If I ever decided to get rid of Arthur, I'd make a Rogue. Unfortunately for me, my most Rogue-like face that no one else is using is...well...Arthur's, so I'll just multiclass to Rogue at Level 15 and keep him forever.
What time is it? Adventure TimeRandom Question Time! If you could pick one Advanced Class to play that your character DOESN'T have access to, what would it be?
* By "multiclass to Rogue" I, of course, mean I'll pick Sorcerer, which is a combination of Mage and Rogue. Just in case anyone was confused.