I lay 4 shorties, they all lose, 3 don't even place. I lay some 20/1 7th fav thinking it's free money and it wins. Or I lay some horse that drifts all day, and it comes back from 35 IR (looking at you, Ahamoment). Laid it at 5.
I'm considering doing nothing but laying favs for 33% of the bank. There are usually at least 2 really bad ones per day.
The second best thing to lay is non favs below 4/1. Everything above 4/1 never loses.