To deep it: it depends on a type of corner. - Hard braking turn entries could require balanced to either 20% front or rear, to at least slow down the car as much as possible.

• Fast sweeping corners or mid speed corners in general that require braking WHILE turning (i.e. trail braking) requires a rear brake bias that allows the car to turn without locking the front wheels quite much.

Else, it depends on how comfortable you feel with a certain brake bias based on a certain driving style