8th edition does not do medium battles well without a lot restraint on both players sides and a good amount of house rules. (Not that 6th or 7th were any better.
A game that has everything from a grot to a titan in the rules simply doesn't work well. Who cares what upgrades I choose for my tactical squad sgt when the knight across the table is just going to roll a few dice and boom whole squad is dead.
1000 points, cut table size a little bit, pick one of the chapter approved 2009 missions with sudden death rules so the one guy who brings a knight for some reason still loses on points.
Probably some of my most fun games in the last couple years honestly. If you have it do a full size table and pack that sucker with terrain for a real fun experience.