New rules? Meh... I'm not sure if I'd call that "new rules"... its basically the old rules anyway. Also, anything that has Deathwing has Hatred CSM and fearless anyway, so zealot doesn't do that much..
"The hour of action is nigh. With the surge of Chaos activity across the galaxy and the threat of eternal damnation more real than ever, the Adeptus Custodes have taken their vow of protection to its logical extreme – they will see the destruction of those forces who pose a threat to the sanctity of Terra. "
I have a very fun (for me ... usually not for what I choose to shoot) 1850 list. 2 Stormsurges, a Riptide Wing, Command and Control Commander leading a drone net of 16 marker drones, then 2 crisis suits as troops with fusion deep striking
It's my fuck all objectives and blast you into the next table list.
Cause you can get a shitload more grav shots than you can lascannon shots
Though yea, A blob of lasgun IG could technically kill it