As for portuguese India and its conquest since 1750 they are huge. Both Diu and Damão have grown from small enclaves to large provinces rivaling old Goa. While Goa has doubled in size, plus in addition to that, Portugal has received several old ports in Malabar.Now that you say it... yes, you're right. No big Portuguese India then.
On a more serious note, what could the Portuguese get from the French? Some French outposts in Africa must be taken. It would serve to improve the Lusitanian connections with the East. Also maybe some Carribean islands, though Brazil could take exception to that. I think the biggest part of the peace for Portugal will be the reparations. If the Portuguese do extraordinarily well, they could demand millions of livres as war reparations. Then sit back and watch as the French economy suffers a meltdown.
it was the dominant European power on the western coast of India. In some ways hindering British India Bombay office (much to the delight of it’s rival in the Bay of Bengal.
As for the French presence on the Indian subcontinent they centered in Pondicherry which was on the East in the Bay of Bengal. French possessions on the west was limited Malabe a small enclave close to recently acquired Portuguese ports in Malabar. French Indian Ocean other possessions at the time were a few islands to the east of Madagascar. While its African possessions were limited to a few outposts in west Africa. While french Caribbean does seem like a likely target the Portuguese also need to worry about French navy close to home and any attack against French Caribbean would require assistance from Portuguese Brazil which is not interested in obtaining more sugar producing territories. Northern Brazil has sufficient land and ability to expand and was already a major producer of sugar.
As for what would the Portuguese gain in peace treaty negotiations? Unfortunately we have to wait till peace treaty to find out.