Just wanted to throw this out there at work for a placeholder for a more detailed post later, but I just wanted to clear up something: I know rotation is the wrong word to use! XD
Simplified: Chains of Ice, Howling Blast, Plague Strike, Necrotic Strike, Howling Blast x n (where n is the number of times it takes me to get full Runic power) Pillar of Frost/ strength trinket macro, (KM proc) FrostStrikeFrostStrikeFrostStrike, etc. I do other stuff in-between (Chains of Ice again, Dark Simulacrum, Mind Freeze, Icebound Fortitude, Anti-Magic Shell, Ghoul/Ghoul sack, Hungering Cold) as necessity dictates.
Halp.
Smooth Criminal