I have it down to two options. I am either taking 3x 12 man squads of Fire warriors, each with a devilfish. Or, I am taking 2x 12 man squads each with devilfish and 2x 10 man squads of kroot + 5 hounds each.
in summary:
HQ
12x Firewarriors + devilfish
12x Firewarriors + devilfish
12x Firewarriors + devilfish
-OR-
HQ
12x Firewarriors + devilfish
12x Firewarriors + devilfish
10XKroot + 5 hounds
10XKroot + 5 hounds