I think its well known that frost isn't competitive when compared to arcane/fire while using optimal procs/sequence/timing. My point is that frost is a very simple spec that requires the least micro.

I'd be curious to see how frost compares for five boxing purposes. I know I've simply gone with the simplest setups for my three casting DPS to minimize micro needs (shaman - elemental, warlock - demonology, and mage - frost).