The first precept is to always thrust over the arm from the onset. This puts you in a position to control the opponent’s weapon arm. As soon as you thrust, pinch the wrist with your blade to establish dominance. Then you can send the pommel to to the chin, loop around for a thrust, and/or pull down to unbalance the opponent.
The off-hand has a role to play in this as well, which is covered in more depth in the Third Precept.