you can run 18 strips off one of those driversin runnign the strips at nominal settings, reason being is you can do a parallel series array, as in 2 parallel chains of 9 strips in series max.
if you went to ten strips the voltage draw on the driver would be too much and either one it would run it hard and cause it to over heat and fail, or two just not work all together, also your voltage draw increases as you increase the current that the strips see, so a 50% overdriven strip “could” be running in the 19.8-20v range.
so layout wise due to the voltage range of your driver you could run between 10-18 strips, but in a dual parallel series configuration so would be 10,12,14,16, or 18 strips.