Whats the cooldown for AirShield?
Whats the cooldown for FireShield?
Whats the cooldown for RaiseEarth?
AirShield is an absolute wreck for chi, but other then that, Lightning can penetrate it, EarthSmash (I think, not sure) can penetrate it. Torrent MIGHT be able to penetrate it as well, but worse comes to worse, just use surge to freeze them so their mobility will be limited after they get out. AirSwipe and Sweep I know will also penetrate AirShield. Also, this is a move coming from a defensive/mobility based element so what did you expect?
FireShield actually takes skill to block something with it, plus, with the stuff that you CAN block with it, 2/3 are redirectable so you can go around the FireShield
RaiseEarth spam is quite annoying, however, this is the element of substance, WAITING for the absolute right moment to strike. Earth is also known to some as one of the most defensive elements out of the four. Also, it's possible to go above raiseearth using Wallrun, Firejet, AirSpout, and Earthbenders can just collapse raiseearth. Water really doesn't have a way to counter raiseearth spam, but the same can be said for Earth and Waterbenders camping.