When Clockwork City was first released, I wasn't impressed by the new crafted set "Mechanical Acuity" from just looking at the set bonuses, but after listening to some discussion about certain cases in which it is strong (such as low-crit builds like Pet magSorcs), I decided to hop on the PTS and try it out before committing to crafting the set on Live. This is what I was getting:
(Parses on 3 Mil Dummy, solo)
Best Parse:
Buffs and Top of DPS page

Debuffs and Bottom of DPS page

Other Parses using identical rotation/build:
41196
41965
41429
41463
Avg. = 41630 dps
Gear Setup:
5 Necropotence (3 jewelry, 2 body)
5 Mechanical Acuity (4 body (chest heavy), 1 Infused lightning staff w/ Shock enchant)
1 vMA Infused lightning staff w/Fire enchant
1 Domihaus shoulder (med)
CP Setup:
40 Elfborn
49 Elemental Expert
46 Spell Erosion
20 Master at Arms
75 Thaumaturge
Skill Setup:
1: Endless Fury, Inner Light, Volatile Familiar, Twilight Matriarch, Daedric Prey, Thunderous Rage
2: Liquid Lightning, Blockade of Storms, Volatile Familiar, Twilight Matriach, Empowered Ward (Elemental Susceptibility for parse), Shooting Star
Rotation: (Light Attacks before every skill after the first bar swap)
Ele Susceptibility, Potion, Familiar, Destro Ulti, Prey
Bar Swap
[Liquid Lightning, Blockade. Familiar
Bar Swap
Prey, 2 Heavy Attacks (just hold down LB)
Bar Swap] - repeat bracketed area
Shooting Star and Potion refresh when they become available
Endless Fury spam at 20%
There is a more complex rotation that seeks to keep Prey up 100%, but I've found I get identical results with it, and this rotation is much simpler.
Explanation:
Acuity has an 18 second cool-down, which actually fits our rotation perfectly. Every other rotation, you will activate the buff when doing the 2 heavy attacks, just after you've refreshed all your dots, so you maximize the amount of damage being amplified. In the last few seconds of the parse, I only spam Endless Fury, even if the dots fall off. There is a great spike of dps at the end as you're practically guaranteed 5 crit Endless Furies, plus whatever Implosions proc during that time. You also get a boost during each of the ultimate ability casts as a lot of their duration falls during the Acuity uptime. On my best parse, I spiked to 63k dps 10 seconds into the fight. Using Elemental Susceptibility works well because you don't need to reapply it during the fight and this build has infinite sustain anyway, so Magickasteal is unnecessary. On the 6 mil dummy, I did one parse and got 38.6k, so there's obviously some tapering off that occurs over long duration fights. Nevertheless, I very much like this build and wanted to share it in case others want to try it as well.
Thanks for reading!