Okay so I'm sticking with my cold sorc. Is it viable to go blizzard AND orb? I seem to recall casting both back in the day. Doesn't lizzard have an abysmal recast time?

Also, if so, how does this look?
Orb 20
Blizzard 20
Cold Mastery 20
20 Ice Bolt (dual synergy)
18 Glacial Spike (synergy)
1 Ice Blast (synergy)
1 Warmth
1 Teleport
1 Static Field
1 Mana Shield
1 Chilling Armor
7 prereqs

What is it they say about silence being golden?