My bench is usually a defensive C and/or backup gloves/platoon players. So I use defensive replacements, and player rest during blowouts for or against. With the right attention to sub hierarchies, you get the subs some games or at-bats, and starters shouldn't go below 97% till very late in the season. Only place I run into trouble is usually in the minors where I forget to set a backup DH... one day you look and your DH is down to 88%.