most requisite

Therefore sobriety is most requisite in persons of standing.

From Summa Theologica, Part II-II (Secunda Secundae) Translated by Fathers of the English Dominican Province by Saint Thomas Aquinas

The victorie of Lucullo, against Tiarane king of Armenia; For what pupose horsemen be most requisite.

From Machiavelli, Volume I by Edward Dacres

But on reflection I decided that what was most requisite to our success was a corporate spirit, which could be best engendered by opening the matter to them as a body.

From Humphrey Bold A Story of the Times of Benbow by Herbert Strang

In the parts where shelter was most requisite, two-thirds of fir and one-third of oak were planted, in others half of each, and in sheltered situations oak alone. 

From The Forest of Dean An Historical and Descriptive Account by H. G. (Henry George) Nicholls

When the body is exhausted by insensible perspiration, the most requisite aliment is that which can equally restore the loss of the solids and the languid flow of the animal spirits.

From A Treatise on Foreign Teas Abstracted From An Ingenious Work, Lately Published, Entitled An Essay On the Nerves by Hugh Smith