I tried a fun army and took 9 units (4 combat squadded) of strike squads with hammer and psycannons vs Astra Militarum. I came in turn 1 with nemisis strike force, He bubblewrapped his tanks in infantry and mowed me down. I got 5 units on the table, 2 next round and 2 next round. 3 punisher guns + pask, wyvrns, lemun russes... I took out 3/4 of his force before I was tabled but it was 10-6 anyway.
What is the secret to making grey knights with their limited models work?