I train players to have between 95% and 99% for the next match, where possible. In other words if any player has 95% or more condition with one more rest (5%) to gain I train them them the minimum required to get to 94% or just under.

I will sometimes let a player gain beyond, theoretically, 99% as part of a 'performance fixing Voodoo routine' or 'convalescence' to fix things ie when I want something to change I change what I do.