Here are the gear sets I am using atm. Some are pretty optimal and some needs improvments, but it is a start for what you sould be looking for.
Wildfire
Last Stand
Leaden Salute
VW WS Proc Set
QD Set
QD TP Set
Melee TP Set
Ratt/Racc Set
Voidwatch Atmacites: Slayer/Discipline
lolAby Atma's: Smoldering Sky / Lone Wolf / Hells Guardian
lolAby Brew Atma's: Smoldering Sky / Lone Wolf / Griffon's Claw
Rolls: I find with most roll combinations depends on party set up, Mobs Defense/resist rate, Situational and personnel Pref.
Tact/Misers (Before Nerf on Misers) has become a staple for rolls in DD party.
Tact/Chaos will prolly become the new staple after Todays update and is pretty slick for Last Stand spam.
Miser or Tact/Wizards is great for WF spam.
Wizards/Warlocks with a throw in of evokers when needed for Mage/Blm party. Keep wizards up and over write Warlocks.
Most other roll combinations are normally situational and should never be overlooked or surpassed by the norm. Such as when i did PW i found myself using dancers/chaos for DD party and evokers/wizards for mage with healers thrown in when needed.
Roll Gear: AF3+2 for appropriate rolls and AF2+2 for JA/Rolls. Luzaf's Ring and Roller's Ring also help, especially in VW. Macro those in for a good boost to your preformance and buffs.
Merits: I wanna say this first and formost, Merit to your playstyle. Some merits are a given, but others are based on your playstyle. I went 5/5 QD recast and 5/5 PR recast for group 1. Group 2 I went 5/5 Snake Eye, 3/5 Fold and 2/5 Loaded Deck. Most cors will agree 2 in Loaded Deck works better and with AF2+2 body augmented it works even better. With all the updates and changes to cor and the rolling system, Winning Streak is also worth meriting pending on your playstyle.
As for your question on ACP body, Mirke is still the best QD piece you can get. Add that with augmented bloodmask for an extra -5 seconds on recast.
Last but not least, make it look good. There is by far to many aby burned cors out there pew pew'n with Arma and no clue how to roll / roll rotate and gear properly for the situation at hand. Make the Pro/Leet Cors proud and rock the job with pride :p
If you need anymore advice, just ask! I can name 2 Cors that post on here that know what they are talking about. Afania and Sehachan have helped me plenty of times, know the job and the mechanics. Afania does alot of testing and his Gear sets are pretty Pro, you should check them out. All in all i hoped this helped and gets you on your way to more PEW PEW.