If you can show me a level requirement for a feat in Fantasy Craft, I'd like to see it. I thought the mastercraft system did away with having a laundry list of prereqs for feats. Also, upon review, Control weather takes 1d6 minutes; making it unsuitable for what they do - physical labor of moving clouds and zipping around making winds (including tornados in combat). I think the simplest solution is my original idea. Full movement action to burn 1-4 action dice for a limited list of Nature's Fury result. I guess it could be made into a trick.
In Equestria, weather doesn’t just happen.
Prerequisites: Sky Herd
Benefits: Negative modifiers for Maneuvers and Travel you suffer due to weather are halved. Also, you gain a trick:
Workin' the Weather (Run Trick): Your run multiplier is reduced by 1. Also, you must invoke one effect from the Dust/Fog/Rain/Snow or Winds portions of Table 7.20: Nature’s Fury (Fantasy Craft, page 369) at the standard Action Die cost. Once per adventure, you may decreases this Action Die cost by 1 (minimum 0).