Bread and butter for protection. One of many 1cost (2ER) defense events which are good. What's more Nerves of Steel generates a energy resource so it's a synergy and extra simple to remove threat. For solo this is rarely too much to remove 2 from main scheme (but even one is positive opeation for this cost).

Rating (A-C) A- not maximum grade, because without removing threat this is too small efect