The phrase "are best found" is correct and usable in written English.
It can be used when discussing the optimal locations or conditions for discovering something.
Example: "The rare species of bird are best found in the dense forests of the Amazon."
Alternatives: "are most easily located" or "are ideally discovered".
Solitude and inhabitability are best found together in fall.
This is the theory that solutions to knotty problems are best found by starting from the greatest number of different viewpoints and experiences – that is, from as wide a selection of people as possible.
While some in Congress have raised the specter of a draft, the Bush administration has rejected that idea, saying higher skilled soldiers are needed in a high-tech age, and are best found through recruitment.
Mr Kadyrov, usually spectacularly unreliable in his pronouncements, may have gotten it more or less right when he suggested via his Instagram account (his preferred method of communication these days) that the "roots" of Dzhokhar and Tamarlan's "evil" are best found in America, not Chechnya.
Those issues often still affect women disproportionately, but there's a whole lot more than breast-feeding at the root of that, and the real solutions are best found in societal and corporate structures that make it easier for men and women both to have more flexibility within work, and more off- and on-ramps in their careers.
The responsibilities, roles, contacts, context, culture, communications, risks, and instincts you need to develop to eventually run a successful startup are best found at a startup.
The truth, as usual, is best found close-up.
It's best found at the research centers of any global American company.
Geothermal energy is best found in areas with high thermal gradients.
Social media promises social connection, but the full richness of human relationships is best found face-to-face.
As in the first days of dating, Sales suggests that privacy might be best found in public.
