IMO, Mercurial is ruining the Live Arena experience.  I have more and more fights with 2, 3, even 4 opponents in 9 pcs Mercurial. 

No gearset should have an effect so powerful that it negates the importance of building toons with strong stats across the board, and the Mercurial effect is that strong.     

I get that it is suppossed to be a strong gear set, but a few small tweaks would make it less toxic.  

Let's brainstorm some potential Ideas to keep Mercurial strong, but tome it down a notch or two.

Here's an idea to get us started:  An Active Skill that has effects w/o a hit like Lamasu's A2, Madame Serris's A2, etc. should at least remove one stack versus doing absolutely nothing.