I would drop the reaver squad down, you are not running short on anti-tank weapons. With the venoms I don't run night shields, because all the units you have are going to be close up on the enemy. same goes for the raider transporting the grots and archon. I think that should just about do it. Getting rid of the night shields will free up 90 points, then dropping the reavers down to 6 frees up another 71 points. that drops you down 161 points, and I would look into dropping either your abberration and just run 4 grots, or your champion in the reaver squad, which ever one you feel does not need the leadership bonus. I would say the abberration because you have super archon to take challenges anyway. Let me know what you think?