I'm using the mage movement tier as an example of things that have been designed that work. Ice floes is VASTLY superior to SWG. On any fight with high movement / or consistent random mechanics (almost every fight in existance) SWG pretty much has to be used with ascendance to get any major benefit form the cd, completely gutting our movement utility. Further to that, most periods of movement are short burts, i.e. one or 2 casts, use one instant, use one charge of ice floes and you're pretty much done with the movement portion. Ice floes is better because it is fragmented and you can use it for the actual cast you have to move for, rather than an all or nothing cd, that with the way elemental works, may only get you one or 2 casts that actually benefit from it. And again, using it outside of ascendance is a trap in most scenarios.