The pod in the first shape in the latest post with pictures looks good. I like the flat wedge shape that will deflect the hull up out of the water and the clean releast at the rear. However the drive shaft shroud is WAY too big. The second hull with the spoon shaped pod has the better idea for the drive shaft I think. But the spoon like shape will generate downward lift much like a spoon's baclside in a tap water flow.

I take back my raindrop shape in light of the suction lift that can occur from water flowing over rounded shapes. A flat or near flat wedge is best but keep it short. And ideally the "step" of the pod should be well back so that it eithef lifts the whole hull evenly when it hits a wave or is behind the center of gravity so lift from the pod does not tend to lift the nose of the hull. Frankly if you can get away witout ANY pod that would be best. And the next best is a pod that runs minimal risk of actually contacting any degree of solid water. Spray and wave crests with no real mass are one thing but if the center pod hits real water that is part of the main body it's going to slow down the hull. Same with any shaft shrouds. Water is hellish at producing drag. The least contact and immersion the better.