I have usually found the best approach when boarding EZY (I would sooner walk on my hands than use Pikeyair) is to wait until the front boarding scrum subsides and walk round to the back (usually possible when boarding from the tarmac). While the sheeple at the front are still fighting over places, I'm usually comfortably seated at the back in a window seat and three seats to myself!
When boarding from the jetway, I can still usually get through to the back. I don't quite understand why people fight to be in the front when there's loads of seating at the back.
That said, I'll gladly pay for allocated seating, it takes EZY up a notch or two from an already good level.