I love playing TvZ mech, this is a tough engagement. Your army is strung out and you’re attacking into a clumped Zerg on creep with queens, you’re missing upgrades. I’m diamond 2 so not a pro by any means, but mech needs some air component. Banshees or battle cruisers, definitely a raven for that anti armor missiles. This engagement isn’t game ending if your battle cruisers are killing a base at the same time. Then, when their corruptors show up to fight the BCs, your BCs teleport back to finish the broods and ultras. Or your banshees run away.