
Originally Posted by
protoswarrior
2 things:
1) If you see ultra-den finished, THEN you get 2 robo's, you're screwed because during that time, he will have Ultras on the field. You can't stall vs Ultras as you can vs Hydras (while you're researching storm) using Forcefield and other gate units. You NEED a high DPS unit as soon as Ultras are on the field. If you haven't teched to robo and are using mostly gateways units like zealots with charge and stalkers, and decide you need to get Immortals to counter the ultra-den you scouted, you have already lost. The time it takes to build the robo's AND Immortals, you will have Ultras knocking at your door.
2) You need 2 chronoboosts to get 1 Immortal out asap. 1 Robo costs 200/100. Getting 3-4 Robo's which is what you would need if you needed to get those Immortals to kill the Ultras, that's a lot of resources at one go which will hinder your production of Immortals in time as well.