What set & skills did you use with the mage? My main toon is a mage. I think you might possibly like to try out using a manashield and sword with orb as your secondary skill. The reactor set is fun to use for farming since energy beams (arc) pass from enemy to enemy but you need a sword for now with orb as the secondary skill for it to work. You will eventfully obtain some crystal stones called Amber. These can help you greatly by changing your mainhand (MH) secondary skill to something else (it can be mage, warrior or rogue skill). Amber can also change your offhand (OH) secondary skill as well. Aftermath coupled with your secondary MH as meteor and teleport/shatter as your OH is really fun also. Experiment with items and sets as you pick them up. Try to save your crystals until you find something you really like.
Soon, you will find a Nadroji item(s) (chest, ring, amulet or helmet). Keep those items. The amulet and ring are special in that they have +2 set numbers which is equivalent to having the Elixer mythstone. Through having these for your ring and amulet, it allows your set numbers to increase. For example, if you had only one reactor legend item your set would show Reactor (1). If you have the +2 Set Numbers from ring & amulet I mentioned above equipped then your reactor set would be Reactor (5). This greatly increases the items potential.
Now back to your question. I have used Rogue and Warrior. I am indifferent on them but it seems you have taken a liking to the Rogue. My first hireling was a rogue. If I were doing it again, I would probably select the rogue again.