Yes, Mages are really fun to play with.
First of all, are you in a clan? They could help you with gear I hope. At lower level I dont think having as much as focus or fire ability makes a big difference, so I would use rings and braces that boost skills youre using. I used energy shield frostiron rings, yule fire attune/lure braces (aggy braces at lv 120) and actually every possible ring that would give me points for fire bolt/storm, lure and attune. I used a Silverweb Charm of Elements which is very good or you could try to use the previous event fire storm charm that adds direct damage to storm and some defense.
I never tried str as a mage, I always used enough hp to stay alive (with energy shield) and all other points went straight into focus. At lv 100 you can use an Aggy book and focus of the seer, both very good for lv 100's. Some clannies of mine leveld with shield offhand, but personaly I liked the extra focus and regen. Regen can be a *** in this game. Being patient or after buying plat and selling chests, you could also buy a focus lux ammy, which could really help the regen problem.
As for skills, I did the following.
(20 skill points in your max atm?)
Fire attune 20/20
Fire Lure 10/20
Fire Bolt 20/20
Fire Storm 20/20
Energy shield all spare points/20
Ice shards if I had enough Energy Shield already or Energy Boost when having energy problems.
Its also possible to add more points into one of your fire damage skills once you have a ring of it and extra points, but I understand that it's quite hard to max all that with minimal gear.
Hope I helped you out!