thx guys for suggestions.
all considered, i go for 2H.
Wedn is close , i need 30-400 pts. i can get {1550 or so} pts with my rating, so it s viable and useful.
have a solid 2H is great for Pve purpose too.

2h vs Dual Wield, I don't think it makes a huge difference for frost. It is minor. Dual wield is less bursty but more constant damage. Killing machine will proc more often with dual wield, but each hit is smaller. 2h is a little better since you will be kited and when all your runes are available, you output more with 2h.
I think same things.