Re: Alternative terms for archtypes?
In my campaign UNTIL has three general categories for threat ratings: Offensive Ability, Defenses and Difficulty to Restrain. Each is rated from 0-3 (where 0 is a normal unarmed human).
A light brick would be 2/2/1 (able to kill easily at close or medium range, ummune to standard small-arms fire, must be held in a reinforced structure). A teleporting martial-artist would be 1/1/3 (able to kill at close range, difficult to target, cannot be restrained while conscious). Superman would be a 3/3/3 (able to kill hardened targets at long range, immune to all conventional weapons, cannot be restrained by any known method).
More detailed explanations of the individual's abilities would be available in their dossier of course, but the three ratings are easy for agents to remember and refer to if they should find themselves facing someone without having been briefed first.
This also provides each superhuman a "power-level" rating which is simply the three threat levels added together ("In other news, a class 7 metahuman was killed in a prolonged battle with UNTIL agents in Hannover today. The incident left six agents dead and seventeen wounded.").