You don't think doing a giant set of legs are tough? We live an hour apart. You should lift with me. We will see who is in lifting shape.
So you can do it?
You just said you never did Giant Sets.
Then why are you asking the question?
If you want more endurance for your weight training do more.
However, this type of training is for pre-contest cutting, not building up.
Be careful about creating too much cortisol and inflammation with intense training as it will mess with your immune system.
You like to do that but you are messing with your immune system by constantly beating yourself into the ground.