I got my armor down to just what I can carry on my character for legendary's. and I still have three slots open (each) on the armor side on my character. The only amor in my vault are exotics. it started with needing vault space, so I first deleted all armor that was under 64, then slowly got it to the point that unless it was awesome it's 67 or better now. as far as what's to come, not really worried about it. This is Destiny the grind never really stops.