Use Feints and Deceits
Meyer's dagger section provides a number of precepts; general principles for dagger fighting.
The fourth precept instructs us to use feints to deceive our opponent. If we hold our dagger in orthodox grip and thrust high, before his parry lands we should wind low to the inside to stab him. Likewise a low stab can wind high.
If using reverse grip we can fake a jab with the pommel high right, and as he moves to grab or parry loop around and attack his right side.