yeah why not, first top em any where from the 5th to the 8th node depending on the stretch. then you can lst the two tops once they get a node or two or long enough to be lst'd.
i topped, and LST'd on my current grow, grew from 6 weeks from seed and now in 4th week flower.. lookin good with an even-ish canopy and a sea of tops
i think you may need to veg for a little longer than "average" to get the full benefit tho,but reckon it's well worth it
there is sort of a different combination of the two methods calld supercropping, you should look into it, it makes your plant similar to a bush in shape!!! Good luck bro.