Meddler

When you're in combat changing weapons or idols results in a GCD, consequently you won't be able to use the above macro to equip the Staff of Natural Fury and shift in one press. What this effectively means is that to take advantage of the shapeshift reduction cost without costing you a lot of stats using the Staff all the time is that you'd need to equip it, wait out the GCD and then shift. If you can do this during a cast e.g. cyclone, equip staff during the cast, shift, there can be benefit in doing so, though you'll later need to swap back when shifting out of course (or wanting to cast anything in the form you shifted to efficiently). Given the lack of free time during PVP and the need to shift quickly however making solid use of the Staff's pretty tricky - I'd probably keep one around for occasional use myself since it's only a bag slot but wouldn't expect it to get very regular use.