Depends the odds on both for me.
if its -1, -110 and the ML is -120. I normally take the -1—- sometimes the odds on them are juiced one way, like the line is -105, etc that influneces my decision as well. If it gets to 2, i always take the ATS numbers Unless again there is skewed value.
Something I do in basketball is sell points to keep from paying juice. I do it with totals NOT lines. Typically give up 1 point to get to +100 or +105 Sometimes you can even get to +110. Ive found that to work well for me.