Howling blast without the 300% Rime proc does not do enough damage alone to make your theory worthwhile, in my opinion. If you popped Remorseless Winter with the Gathering Storm talent (causes remorseless winter to extend its duration by 0.5 seconds and increase 15% damage for each rune spent) and could keep it going indefinitely then you have a very viable chain-pulling method of massive aoe damage.
A different take on your theory would be stacking haste to spam frostscythe. With lots of haste (and a good amount of crit), Killing Machine would most likely proc often making your quad-crit Frostscythes doing incredible aoe damage. The drawback would be much less mobility since you would need to always be in the midst of your pulls to take full effect of the melee cleave.
edit: For either situation, you would need many, many mobs in a close proximity for this to work. Most dungeons will have a mechanic, RP event, or specific mob that will make it very difficult to pull off giant pulls.