If its sc and not bw, then just tech to templars. You needn't a robo facility so early in the game. Remember that zerg has no lurks so he cannot contain you. Just tech to templars, expand. Make a couple of archs. If you're just worried about getting passed his defenses, make carrs with arbiter and ground support(temps, zeals, archons). Forget reavers; they're too stupid and slow.