It seams watering can directly affect the success rate when rooting. When to start, top vs bottom, fertilizer, misting, and frequency are all important factors. Can the really good rooters post sme of their watering techniques?

I think you need to be more specific.  "When rooting" means what? 

Already rooted, you'll get different answers than

Prior to roots.

Suzi

Sorry, new cuttings.

OK, my opinion.  Sphagnum Moss has anti-mold properties.  I would mist a bunch of it, roll it in a paper towel to make sure it is just damp and not wet.  DAMP is key.  Then stick the cuttings in there in a zip lock that you blew in so it has oxygen, and let them root.  Take the paper towel that you soaked up the water from the Sphagnum, stick the rest of the cuttings in a baggie that you blew in so they have oxygen with that.  Put it all in a drawer and check in a week or so.

Suzi

Edit.  I wasn't clear.  Sphagnum moss is not Peat Moss. 

Sorry Suzi, it is now my turn to be not clear. My cuttings have roots and showing top growth. They are presently in 32 oz cups in coir/perlite mix.

Keep it simple... if you see "dew drops" on the inside of your cup, don't water. If you don't, give one half turkey baster squirt to one side of your cup. I say one side so that if you add too much water, the roots still have a dry side.

As you get more foliage, water when the leaves begin to wilt.