For set gears, in my own opinion, those archmage, scorpion and hunter sets are kinda junks. Those are the 3 sets which consist of 10 parts to consider a full set. I myself prefer ultring set, which only consist of 4 armor parts, providing more enchantment and charm slots, as well as better set bonus to me. And most important, the flexibility of using legendary accessories than limited by those in the 3 above set which give you crappy necklace, rings and etc.
+2, i totally agree here

I to started out with a mage, but now i became sort off melee-caster type.
I got high vit-str-and semi-high int.
I only use fireballs (8/10 atm) and it does nice dmg to those around you

(dont forget the chance to do DOT)
I to would forget about the set gear. ive seen archmage and found it crappy as well.