Granted yes most codicies won't have a clear method of bringing it down, but we haven't seen the rest of the codex yet nor what the core formations contain that will then allow you to take several.
Fog of Dreams. Hammernators. Dominate with Ld penalties. Psychic Shriek en masse. Hammernators. Lychguard. Devastator Centurions. Daemonhammers en masse for GK. Misfortune and First Rank Fire Second Rank Fire for Guard. Daemonettes for Daemons, or any army that can access Malefic.
My ass do some codexes struggle to deal with it. Armies, sure, but Codexes? No.