I feel your pain

I compete bd and have had enormously varying scores, I will say tho if I have had under 60% something has gone wrong be it tension, spooking or an actual mistake, work on a good forward rhythm and nice transitions, keep your circles correct sizes and shapes and everything will fall into place x keep at it!
Btw not everything at bd is a warm blood, mines practically a cart horse, but a good correct test will always score well irrespective of what type of horse youre on. It will only affect you once you get up the levels.