The phrase "best used for" is correct and usable in written English.
You can use it to indicate what something is best suited for. For example, "This seasoning is best used for grilled chicken dishes."
SWORD is best used for recurrent deposits.
They are best used for analyses over broader areas.
We can't just say Connecticut land is best used for growing houses".
Our tub was on the small side, best used for a shower.
Courgettes have male and female flowers, and it is the long male ones that are best used for this dish.
"Libraries are best used for their vital original purpose – to make books and learning available to all.
The arid land was best used for pasture, and sheep thrived until well into the 20th century.
Aiko's inventor thinks his slim, long-haired, big-eyed fake woman would be best used for the duties of receptionist, nurse, cleaner and - can you guess? - sex doll.
A new bacon scented with cinnamon and apple-wood smoke is best used for breakfast because its flavors pair beautifully with French toast and waffles.
The dressing was equally bad, also suffering from a shortage of natural ingredients and certainly lacking any taste other than vinegar best used for cleaning purposes...
To "transpire" is to emit through the surface of leaves or skin and, figuratively, is best used for when some fact oozes out, especially a secret.
