I get what your looking for, many players do not really look for fluid and fast attack chains in the perspective of the eyes, many do not even look at the animations so your getting the wrong advice somewhat. I highly recommend fire, sonic, water power, staff, dual pistols, energy, martial arts, street fighting, beam rifle for ranged, for secondaries like defenses you want all toggles or passives there are quite a few I like sr for that, ele armor I recently discoered and its good to. I do not have allot of experience with control powers or support beyond a few atm, but from what ive seen storm seems very fluid, as well as empathy, force field, time sonic, maybe radiation but I used it on my controller for debuffing and it was still kind of clunky but more fluid then others, not sure on plants, cold, and I mained a d/d defender on live so I know dark powers are super slow so do not bother.