Like Kaynin said:

Get a team mate and preferly a healer!

Why?

Because they all got good defensive abilties and they can heal YOU when you get zerged!

Thats always the problem when i get zerged is that once i start to heal im dead in 90% of the fights. Healing one is someting else but when 2 mages who outgear me and get some healing its not possible for me to keep up!

Ice block/divine shield = gone if you got a priest buddy!