Any Ice Nova Templar? Need help.

Just wanna know your passives and how you do ingame. Ty!

I actually want to be a firestorm templar, but I still use Nova a lot because it's so much more convenient most of the time.

http://www.pathofexile.com/passive-skill-tree/AAAAAgUAAnEEBwSzBVsUTRmFGjgabB8CJKopTzbFNuk62DwFPV9G103YUlNgbYFvgpuDOIuMjHaPRpBVl5WdgJ2unjyf36IApwinhNDQ2CThc-Nq5CLsOO0g73zwHw==

Currently I have a 8% Ice Nova linked to conc effect and added lightning damage
and it works very well.
For bosses/stronger enemies I prefer to use firestorm+duration+ conc effect though.