Probably the RK2 version of Lysdexic: a level 90 nanomage Agent with Mimic Enforcer capable of insta-casting the top nanos (even insta-layers when full aggro).
That toon was so ridiculously OP against the traditional enforcers and NR3 agents which were running around in TL3 at the time.. with some HP management I could take on two high-end NR twinks at the same time and kill them both.
e: with HP management I mean ... casting and cancelling nanos to have anywhere between 6.5k hp and 1.5k hp during the fight, add to that the fast-ticking HoT from Mongo Crush. 30% cap me some more, please!