Taleof2Cities wrote: »It depends on the content type, @Lixiviant.
For PvE DPS, Shooting Star will synergize with your front bar Inferno Staff ... though for group content your teammates would rather see you use a different ultimate altogether to boost your DPS.
For PvP, Ice Comet is nice as it brings a snare. In addition, if you’re running any sort of Ice Mage or Frost Warden, maybe you back bar Ice Comet to support front bar Sleet or front bar Eye of the Storm. On my PvP Frost Warden, I usually back bar the Trees ultimate as an emergency heal, though.
Be prepared for veteran PvP players to just block it ... as the ultimate has a long animation telegraph.
If you’re just derping around solo overland content, @Lixiviant, then you might want to level up one morph ... and then respec to the other one and level it up as well.
That way you’re flexible to the content type ... as well as being fully prepared for any future changes the ZOS Combat Team decides on.