I agree add a faster G line over metagross, Absol is a great disruptor and can do some damage. I've been playing him as a tech in my Garchomp toolbox and he works well. Even a Ape or Lux 2-1 line would be good for fast attacking.
For the rest:
-2 SSU
-2 night teleporter
+1 Vs Seeker
+2 Warp...