Use your kick to BREAK HIS LEG

That will lower his guard for sure!
The attacking tool would depend upon your angle and distance.
Practicing a Lead Pendulum Round kick is a good thing to do.
When refined they can get quite strong and fast. (my stomach hurts right now because I have been working on it)
The way I end up throwing them they tend to look as if the target is going to be midsection but then the Leg Drops down at an angle to a low kick. This makes it hard to defend if you haven't seen it before.
Another technique that I practice a lot on the Mook Jong is to "Reap" the lead leg at the Knee using my Lead Foot to pull the opponents knee forward and then using that as a "Chambering" motion to Side Kick into the Rear Leg.
Pulling the front knee out makes them transfer weight to the back foot.
jmp