Sigil of Power and Frost Shield feel awful to use when the game constantly forces you to move

Those skills feel awful to use in regular non bossing play because the game is constantly spawning lightning mirages, caustic orbs, lightning totems, exploding crystals, etc.

Those circle based skills are supposed to enable a playstyle where you actually should be able to stop moving on a caster and you should able to cast for a while with all the defenses you are supposed to gain from both of those skills reaching max charges, but with the current state of rares they just don't work because as soon as you try to set them up something always spawns on top of you and forces you to move.