Grey Knight Purifier Force-

Crowe - 150

5 Purifiers - 2 Incinerators, 2 Halberds, D.Hammer, Rhino - 169

5 Purifiers - 1 Psycannon, 3 Halberds, D.Hammer, Rhino - 181

Very small strike force. Would probably be very hard to win, but I think once you get any of them into close combat it would be hard to beat. I might even leave the squad with the psycannon protecting an objective and send Crowe in their Rhino at the enemy. If I keep mobile and in cover for long enough until I can get into combat under my terms