
Originally Posted by
0mar
Immortals are kinda cool, but they can be more of a liability than an asset against Terran. On paper, it looks like it counters tanks/marauders pretty hard, but in actuality, they have a difficult time dealing with marauders and almost never reach the tanks due to the meatshields in front (eg marine/hellion/marauders). So in actuality, you are doing yourself a disservice by building immortals against Terran mech.
The marauder vs immortal dynamic is especially egregious. Marauders beat immortals for better than cost once you hit critical mass, which is around 12 or so. Throw in stim and you can easily take out 1.2x to 1.4x the cost of immortals. Versus a decent player who microes his marauders, going zlot/immortal is the worst decision you can make. Immortals are too slow to catch kiting marauders while zealots will never do any damage because of concussive shells.