i generally add about .5 oz to 48 oz oils, tho i know other soapers use more. i mix it thoroughly in my reserved goatsmilk and add after i mix in my lye water.
the trick to no honey glops in your soap is to thoroughly mix and thin out the honey before it goes into the soap batter.
I've made two batches with honey. The first was at 1tbsp ppo, the second was 1tsp ppo. Both got hard as a rock and crumbly (though the first much more than the second). The recipe used was one I use quite frequently, and I soaped at room temperature. I let one gel and the other went straight to the fridge in case overheating had been the culprit.