Gym nuts of GAG, how would I split my leg day?

Now, I am a naturally thin ectomorph, and I want to balance my body out. My arma and shoulders are so dominant, they get a lot more size much faster and easier than my legs. So for the moment, I have stopped training my upper body and mostly just work it out with twice weekly pilates sessions, and I find that works for me.
Being an ectomorph, I don't do any cardio aside from a five minute warm up before I lift.
So all of this only gives me a reason to go to the gym two times a week to train my legs and glutes. I would try to make three, but then I would be overworking the muscle.
I feel lazy only going to the gym twice a week. I want to split leg day, but I don't know how. My primary focus is trying to build bigger glutes and I'm impressed with my progress so far.
A typcal leg day looks like this: I'll usually pick 4 or five exercises.
squat to 1RM and back.
SL Deadlift
Cable kick backs and cable fire hydrants
Leg press or single leg leg press
Weighted lunges
Step ups
Bulgarian split squats on the smith machine'
leg extensions or leg curls
Back extensuions.

How should I split my leg day?
Gym nuts of GAG, how would I split my leg day?
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