Tour De Nez is what I use. Its more “sharp” than Nevada City classic and REALLY replicates the big surges well.
I also find 8DC Stage 8 2015 is a good one. Depending on where you live and the type of crit racing its got the super intense start, slight lull in the middle, super intense finish feel to it.
I did it as part of “race prep” when we had gaps in calendar. I can tell you that the 8 or 9min or whatever it is in the middle, which it looks restful is ANYTHING but. It’s basically doing sweet spot after jacking your heart rate through the roof prior. And just as it starts to come down you get into the final section of the “race” that just. does. not. let. up.