I'm having a blast running a vaal double strike gladiator. My clear speed on maps through T8 is as fast as I can leap slam and attack once at 5 APS, and the single-target damage is absolutely stupid. I'm 85 right now and haven't had a boss fight (phase, at least) last longer than 6 seconds, and it's often 2-3. The only time it gets a little hairy is when I have a betrayal fortification event with 4 allied, promoted, and itemized enemies. I't's immensely forgiving on gear, too, since the build only uses 3 skills that require linked sockets, has no required uniques, and double strike basically scales with haste. It was a little rough until I got my 4-L set up though.