You said you smelled a pungent aroma from the root mass on one earlier, and then in this one, you said that your holes are drilled 1" from the bottom for drainage. That leave an inch at the bottoms of your buckets to collect moisture. Soil medium needs to FULLY drain all the water. And I wouldn't be too caught up over exactly how much water you give them. With the mediums you're using I'd suggest watering when they need it. A good rule with soil is to water when the top inch and a half of the soil is dry. I irrigate my soil with 3 times the volume of the container, i.e 5 gallon pots get 15 gallons of water. That saturates the soil pretty heavily but if the drainage is set up properly, it will take older, looser , soil out through the bottom of the buckets. When they start getting a little low I throw fresh soil (I use Happy Frog) on the top. It acts to help freshly fertilize every time I water, saving money on nutes. It saves me from such problems as salt lockout, nutrient burn, or deficiencies but leaves me vulnerable to fungus/mold. Which I control with beneficials and heat.
That 400w is gonna blow you away. I'd suggest putting your CFL's along the sides of the plants, on the outside edge at about half of the plants height. The 400w is going to way overpower your cfl's, making them almost useless as top light (they shadow plants from stronger light). However, I've seen CFL's used on the sides in HPS grows and they make the buds friggin beautiful. The also keep mildew down by lighting up shady parts of the plant.
Hope this helps!