I'm a bit surprised most of you have trouble getting close at Mordor. I stroll up the right side every single time and end up a few rows from the front by walking in from the side. I never understand why but no matter how packed the place is on the left and at the back, there's always a big gap exactly there at the top right. It's been working for me since they switched to the side by side stage setup.
I usually arrive a few minutes before the set but have never needed to arrive properly early, even for the Cure and mbv this year. Ended up really close.