In all the talk of graphical downgrades no one seems much preoccupied with 'why?'. Why build something and then proceed to tear it down, piece by piece, in the hope that ever more diminished expectations about the final product won't be severe enough to...
Keep on the move and your shots will go farther across the battlefield if you do.
Don't waste your beam. And make sure you turn it off between rounds.
The jump function can save your life if you use it at the right time.