For what it's worth, my 3rd in a 5x5 is always the hardest for me. If I can get past the first minute of the 3rd than the last 2 aren't so bad, although today I waaaaaaaaaay overcooked the first one @ 125% and my last one I only got out about 107% (I was targeting 110%). My first set of the season so it will take a while to dial in my RPE. Like Creakyknees said, a lot of it is just about tolerating the pain.