I usually
1st leave them cut high so can try and push over.
then hoe some of them which guess is not option for you.
the ones that are too big or will not push over I usually cut close as i can to ground and if they are not real high put modified 2B around over them.
then I may even get a stump grinder to get some that warrant grinding down.
the modified 2b helps a lot for some thing quick.