I tried cooking the night before and reheating the next morning and wouldn't recommend it. But I have found cold scrambled eggs make a good topping for tuna salad. Boiled eggs do a serious # on my stomach so I switched to scrambled eggs for my tuna salad, top with some lemon pepper and Extra Virgin olive oil.
Dude, they don't take that long to prepare maybe 8 minutes tops. Don't risk the reheat I'm sure it's nasty. I started adding cheese to the eggs after watching THE RECRUIT, and damn is that a good addition.