Swinger is a much, much better swing timer mod. I wish people would stop linking horrid attack bar timer. =P
http://ui.worldofwar.net/ui.php?id=4089
As an aside, I'm pretty much set on using my first five Nether Vortices on Stormherald. That is, unless someone can convince me otherwise. I play in all three Arena brackets competitively (just started my 3v3 yesterday). When a match turns into a 1v1, a mace stun proc gives one side a huge advantage.