You'll get much higher damage spreading some dots around first, unless the mobs are so weak that damage doesn't matter.

I love using Mind Sear in Disc spec also. Its great on trash like scorpions where theres not a lot of damage flying around, but even gets brought out in boss fights. I was tank healing on Rhyolith the other night, but didnt have to do a lot of actual healing in Ph 1. Most of my time was spent doing DPS; Mind Searing the small adds, and then atonement healing on the big add (which works really well due to the stacking Infernal Rage).

It's lazy if you do it incorrectly, which is what you're suggesting. You also need to maintain evangelism stacks and ES.

that would be kind of like a fire mage just popping flame strike. You have to keep enough sw:p out to practically guarantee an orb proc withint a 15s window (I tend to go with 3), and keep up mind flay for evangelism if you want to get the best out of it. Maybe not as hard as others still, but it's not quite as simple as you make it out to be.

What about frost dk? Just put your diseases up on one mob, pestilence, then continue your normal attack on one mob and let howling blast do the work for you.