Leg day is the best day. So what if it's hard? You've already put in eight weeks of solid work—there's no reason to stop now!
Squat with good form. If you find yourself doing a 225-pound Good Morning, you should stop. That goes for all the other movements as well: Proper form reduces the chance of injury and encourages full range of motion.
That last 10 minutes of lunges might hurt, but your legs will thank you. Do every minute. Don't quit!