Gaunt teleportet and I summoned 10 Blues in between, so opponent couldn't charge the flamers directly.
I was able to kill a major thread with the flamers each game they spawned and saved them against shooting from Skullcannos and OR catapult by using destiny dice. Kairos sniped important support heroes.
And of course, the burning sigil made some lovely spawns to block movement or charges.
VS khorne, he almost had killed the flamers, but I was able to return 5 using fold reality.