As to new frost mastery...
- they need to scale it better, currently it is less damage than live mastery
- they need to help BF FFB damage, it took a huge hit
- Water elemental icicles need to move to the water elemental or simply have mastery bump water bolt damage
- a separate spell to fire Icicle and FoF Ice Lances generate Icicles, change Ice Lance scaling as appropriate
- Alter Time rewind of stack should add to the Icicle stack, as in AT ends and we have a 3 stack, and when we hit Alter Time we had a 5 stack, then we have 8 icicles, with 3 auto fired on AT expiration. Aka we should not lose Icicles generated during AT
If they did those things, then mastery can compete with haste, we don't have Water Bolt Icicles watering down the Icicle stack, and we have our three main spells contributing to Icicle generation