If your betting Dogs ATS, question about the ML?

[ebbearsfb1]

starting to play mainly dogs against the spread.

for people that play mainly dogs.

do you always bet the mL for the dog as well?

or just in certain cases? vary the amount on the ml dog, depending on the spread?

for example
I am trying something with NBA dogs..

ATS: bet 100 dollars

if the ATS: is 1-4.5 ML dog risk 50
if the ATS: is 5 to 9: ML dog risk 25
if the ATS is double digits: risk 10

any suggestions?