I'd still fully tuck in my motor to get on the plane. I'd then be trimming out my motor the same time as tabbing down. I'd get to my downsea trim position on the gauge and then trim with the tabs. If you are still bouncy in the nose like when you head out into a headsea you might have to use a bit of engine trim too. Some days in the Stabi punching a sea I would be full tuck in plus a heap of tab. Fuel economy wise you are best with your prop level with the keel and if the waves are tossing your nose around too much, use your tabs. A fuel flow sensor will confirm this.