Pre-seed

So I just bought pre seed and my fertile window starts today. My fiance has taken some tests from the store to check sperm count and his is low. So we try as hard as we can go not baby dance every single day in a row so his sperm can mature. Sunday is 33 percent chance so the highest chance of conceiving. Trying to figure which days would be best to use the pre seed. Window starts today and ends on tues I think.