Static Charge — Stuns enemies within 8 yards for 5 sec. 5 sec cast.
Strategy
Jump over the laser beams criss-crossing the arena. Dodge the balls of light getting shot out of the cannons. Focus on Disruptron. Only two of the three cannons will be active at any time, up until 35% health when Disruptron turns them all on and massively increases their rate of fire. Save CDs for that point.
By ignoring the disruptors and focusing solely on Disruptron's 10.5 million health, ~88K DPS will be required.
Quotes
Intro
<Announcer> yells: That's actually some pretty good engineering down there. It's Disruptron time!
Hotfix (2012-11-29):Disruptron Mk. 3R-Alpha's attacks will no longer sometimes strike spectators in the Brawl'gar Arena. His attacks will now properly strike opponents standing on the grates in this arena.
Disruptron Mk. 3R-Alpha
Static Charge — Stuns enemies within 8 yards for 5 sec. 5 sec cast.
Hotfix (2012-11-29): Disruptron Mk. 3R-Alpha's attacks will no longer sometimes strike spectators in the Brawl'gar Arena. His attacks will now properly strike opponents standing on the grates in this arena. 
