Hi Tgrace,
I have played around a little with that scenario.
A cool drill to develop coordination is the chambered single sinawali drill.
For references, please refer to the following:
Modern Arnis:"Phiippine Style Stick Fighting" by Remy A. Presas - usually referred in the US as the "Pink Book": Pages 131 and 132.
Guro W. Hock Hoheim's "Filipino Combactives" ("Archipelago Combatives"): Level 2. Please refer to level 2 documentation and video. It is called "Chambered Single Sinawali".
"Complete Sinawali" by Renaldo S. Galang. Pages 45 - 47: Bunot-Kaluban:"Drawing the Sword".
Now for the drill:
First practice chambered single sinawali with with two sticks.
Then practice it with a stick and knife. Basically its the same drill but the knives will do the work of the other stick.
Now incorporate the movements to practice same-side and opposite-side drawing of knife from holster.
I. Stick and knife
II. Empty-hand and knife
III. Empty-hand and whatever weapon.
Note: these drills are from the right-hand dominate perspective, they can be reversed and practiced reversed.
I. Practice also stopping/grabbing an opposite-side punch, drawing the knife with left-hand with the knife holsterd on same side or opposite-side.
II. Practice also stopping/grabbing a same-side punch, drawing the knife with left-hand with the knife holsterd on same side or opposite-side.
III.
a. Practice passing an opposite-side punch, drawing the knife with left-hand with the knife holsterd on same side or opposite-side.
b. Repeat with opponent throwing a kick instead.
IV.
a. Practice passing a same-side punch, drawing the knife with left-hand with the knife holsterd on same side or opposite-side.
b. Repeat with opponent throwing a kick instead.
Have fun,
Palusut