The Acarya views the last stage or asrama in a man's life as the years during which he renounces Vedic works and devotes himself to meditation and metaphysical inquiry. But, unlike the Buddha, he does not want Vedic karma to be given up in the earlier stages. According to him, only after a man cleanses his consciousness through years of Vedic rituals is he to become exclusively devoted Atmic inquiry. First accept the karma that Mimamsa asks us to perform and finally give up that very karma as suggested by Buddhism.
The Acarya goes along with systems like Buddhism, Mimamsa, Sankhya, and Nyaya up to a point. He accepts them on a certain level, but on another level he disapproves of them. Each of these systems regards one aspect of truth to be final. Our Acarya harmonises them all into a single whole Truth.
For a general background, please see here