Race Wheels should be only Race wheels or training day wheels when the agenda is to replicate a race day. For every day riding and training, use a heavier set of wheels and tires . This makes your race wheel set feel even lighter come race day.
On the issue of tires, you must have the best tires possible on race day, if you have sliver cuts or the tires are worn, this is not good. It's acceptable to have a race mishap but an equipment failure because you are using your race equipment is not good on a race day where you are ready.
That is the decision to make, but if you race you need race equipment and training everyday equipment. There really is no two ways about it, keep your race equipment in excellent shape and then you'll not have to worry about it on race day.