Use max. reverse on every RTO regardless of the failure.
A wild sweeping statement IMHO. I've had a takeoff config warning at 95kts. First reaction was "this can not happen and must be false." 2nd reaction was, "something is not correct so let's stay on the ground." RTO sped about 105kts RWY 2400m, dry. Pulled full reverse so F/O didn't go crazy at non-standard actions, and then set them to idle almost immediately and disconnected auto brakes. Turn-off was at the end. QED.
Remember TR's are not included in the stop calculation on non-slippery runways. Look out the window and retard as necessary, surely.