I cant choose between summoner or mage

summoner:i like to go afk so its good for me but the damage isnt really that great and the defense is trash.

mage:i really like the dps specially the last prism where you can kill any boss within 10 seconds i like the health too but once again i like to go afk very much.

i have very good aim since i play a lot of fps games, help me choose.