Frost mages, please give me some tips ?

We have a great kit and lots of spells, I get a bit overwhelmed while pvping

How do we start playing 2s and 3d when gates open?

I mean, when Im the target it screws. Should I.. alter time? Ice block? Try to get a kick on sheep to cast ray, while i tank damage? The ice cold thing (forgot the name)? Frost nova? Blink behind pillar?

I really appreciate if you Could get me some help

I just learned that the fire breath + the stun “circle” is a very good combo. What are some other good combos?