Tal'Darim Armored Squadron

Tal'Darim Vanguards with Havok support. While their counterparts of other Protoss factions are piloted by honored veterans, Vanguards are penal units. Amusingly Vanguards are more effective at dealing with armor than said counterparts (Hybrids cry tears of pure Void when face a pack of them), can also devastate hordes with a well-placed barrage and act as siege units (travel time matters little against buildings). Add something to hold hordes in place and for AA, throw in Havok for extra range and you're set.