Stop the drip altogether if you want dwc and let the roots drop down to the water. I ran drip for a long time and part of the point is to not have a great root system because it is fed strong and on the rootball. No need for the plant to make nice roots but may do well.

Once the rootball starts to dry you will get some nice new white roots coming out. Have an airstone in there to splash just alittle. Once the roots get to the water you may want to drop the water level just a bit more.

If you keep the drip I would go only once or twice a day as your doing. the drip is nice to start but only caused us root rot problems in the end.

Maybe a little stress but your plant looks good.