I wouldn't show weaves, just their effects. Show the beam of light for balefire, the fireballs, the lightning bolts or the people hanging in mid-air. If the scene is about the channeling, for instance, Nynaeve's first duel with Moghedian, or a teaching scene, or maybe the Bowl of the Winds, I'd maybe switch to a non-real scene, like when Frodo wears the Ring, and then animate the weaves or the metaphysical results, like show the personal connections to the source and a shape trying to cut them off, representing the shield. What I would not do is show the weaves that form things like fireballs or bonds of Air.