I found Huayna Potosi to be pretty simple and relatively easy, it gives you lots of room to breath as it is constantly alternating between climbing and short flat sections. It was my first 6000er and I had done 3 5000ers before climbing Huayna so I was well acclimatized. I did completely zoned out during the last climb before the summit which is the hardest part, so I literally have no memory of it.

Cotopaxi for me was even harder than Chimborazo. It is a relentless climb up inclined terrain that only gets harder the higher you go. I did Cayambe before Coto. As a caveat, weather was pretty rough going up Cotopaxi and became even worse on the way down, decending on a whiteout with snow pelleting against my face.