Units in PvZ
Lings
Zeals, Storm, and Archons all work well against Lings. Early-game use Zeals; mid-game use Zeals/Storm; and late-game use Zeals/Storm/Archons.
Hydras
SpeedLots with Temp support is the standard way of attacking Hydras. Mixing in a few Goons is a good idea as they can get in some free hits while they try to Storm-dodge and out-manuever your Zeals.
Hydras/Lings
Having SpeedZeals for the Hydra, Temps for Storm, Archons for the Lings, and some Goon support to fight Hydras/Lings.
Lurks/Lings
Use SpeedLots, Storm, Archons, and Obs. You can also use Zeals/Goons/Temps/Obs. Either way works. Remember that fighting Lurks with no Goon support means that you need to run the Zeals on top of the Lurks to decrease the splash damage dealt by the Lurks.
Hydras/Lurks
SpeedZeals/Goons/Temps/Obs is the way to go against Hydras/Lurks. Storm well and try to kill the Lurks as quickly as you can so you won't be getting the splash damage.
Mutas/Lings
Archons are obviously the best choice here, but using zome Zeals and having maybe one or two Temps is good too.
Hydras/Mutas
Try to Storm the Hydra before he snipers your Temps with his Mutas, and try to not lose your Archons to his Hydras. This can be hard to deal with, so you need to use your units efficiently.
Scourge
Goons and Archons work just fine at taking out the airborne kamikaze units.
Guards
Sairs work well here, as do Goons and Storm. Maelstrom works nicely too, as it lets you get close enough to destroy them before they can do any more damage.
Devs
Scouts and Carriers are good here. Storm also helps, as does Maelstrom.
Queens
Feedback is nice if you can cast it before the Queens flies away. Don't clump your armies so that Ensnare isn't as effective. Keep note of any units with Parasites and decide how to deal with that situation. Faking an attack using a Parasited unit is a good diversion.
Defilers
Feedback again could work nicely, but otherwise just try to kill them before they become of much use to your opponent.
~*rpf