It is a bad composition so the Zerg is pretty free to do almost anything that isn't heavy ling/bling style. I think mutas into roach/BL is probably the best bet but Swarm Host would work as well and slowly poke away at the hellion numbers. BFH/Hellbats are good against locusts (obviously) but the Terran will still lose units every single wave.Spores+swarm hosts ? I mean that should be a no-brainer against any composition without tanks or marines.
Also, judging by your woes in ZvP, you are probably not looking at the upgrades of the toss, +3 air will fuck up anything 0/0.
Shit even if you open 1/1 Ling you could probably beat it with Ultras.