The key to keeping sane with redeyes is to convince yourself they are great because your Time away from base is less because of the late day one start (at least on the HA side). The 3 day is practically a 2 day because you have the whole first day at home mostly. After you can hold or swap for day flying you realize redeyes are killing you slowly and will avoid them at all cost. It’s all just a mindset. See the positives and call out FAT or sick if the negatives catch up with you.