Using death and decay in frost spec for multiple adds

[Evilcabell]

Hey everybody,
(I wasn't sure whether this should go in advice or theory and mechanics. I'm sorry if I guessed wrong.)
I use a 2 hander frost spec. http://www.wowarmory.com/character-s...&cn=Evilcabell
I don't tank with other dk tanks very often (in fact, I try to avoid it due gear drops) but the few times I have, I've noticed that some of them use death and decay constantly. I use it for multiple mobs mainly (dropping it more or less at my feet and then frost biting a mob or death gripping a caster) or to drop at the healer's feet during a summoning fight.
When I first started tanking, I used it all of the time. I've since weened myself from using it so much but I still find myself dropping it several times per dungeon.
I've seen some articles stating that frost tanks should not use death and decay as a regular part of their pull. The idea seems to be that using howling blast and 2 disease pestilence for initial aggro and maintaining it through blood boil and howling blasts.
How viable is this? I've tried it a few times; I've found that, for me, it is almost always sufficient to keep the healer from taking aggro (which is my #1 threat priority) but dps will grab aggro if they aren't targeting the same add that I am or if they use an aoe.
My current use of dnd works for me; what I am wondering is if there is a better way. Theoretically, I could see how combining glyphs of icy touch and howling blast could make this possible.
Anyway, I'd love to hear some advice/thoughts on this subject.
(Sorry for the wall of text. Endeavor to endure.)

[Malleus]

DnD > HB > BB is how I start aoe pack pulls and have NEVER had an issue. Continue using HB & BB every time they are up and use Oblit when HB is on CD. I do have trouble with holding aggro initially when I do IT > PS > Pest > BB > HB, but that is probably because DPS'ers cannot WAIT to blow their wad all over the place as soon as I even look at a pack of mobs...

US - Fizzcrank - Malleus

[Selene]

DnD > HB > BB is how I start aoe pack pulls and have NEVER had an issue. Continue using HB & BB every time they are up and use Oblit when HB is on CD. I do have trouble with holding aggro initially when I do IT > PS > Pest > BB > HB, but that is probably because DPS'ers cannot WAIT to blow their wad all over the place as soon as I even look at a pack of mobs...

US - Fizzcrank - Malleus

Pretty much what I do also.
Or I will drop D&D, IT, PS, Pest, BB, HB.