Professional Locust achievement in Gears of War: Judgment

All of the Locust kills may be attained in Private solo matches against robots. Some are easier than others. If, like me, you like doing things cooperatively, then gather 6 players (4 with guest controllers) and let's get to work.6 Players - 4 with guest controllers
~ 5 main accounts on the Locust side starting as Tickers (including player going for kills)
~ all guest controllers + one main account on COG side
~ the one main COG account should be a Medic with others Scouts

Two hours is enough for one rotation of six players.
With a sixth account simply idling a controller, a little over three hours will allow for two rotations of 5 players. Figure between 18 to 20 minutes per player turn. In private matches, players are not be kicked for inactivity. Just have them plug in a wired controller.

Have one player without a guest controller invite the others into a game lobby. Have them Select Versus > Private > Overrun > Map: Terminal with Mercy Rules set to 'YES'. The idea here is to run one player through their kills per match. Another player will work on Medic Revives at the same time.

At the start of the match, tickers will work to create a path to the COG. With the Medic off to the side, the Scouts will group up. Once the player doing the killing arrives, the Medic will continuously revive her teammates as they go down. I would suggest that the killing player work to get to the highest needed Locust as quickly as possible, but that is only a suggestion. Just remember not to kill the Pretty Red Head for she is the Medic.

While the killing is happening, the remaining Locust can finish clearing barriers. A designated Locust player needs to head to the e-hole and reduce its health to 6% with the Right Trigger. They then stay near the e-hole to finally destroy it once the timer gets under 10 seconds. There is no need to reduce the health of the Generator. A turn can take about 15 minutes to complete.

Once the match switches sides, the game lobby host may back out to the menu (taking everyone with them) to allow for the next match. If you don't need XP, there is no need to play as the other side. All revives and kills will still count. However, if you wish to keep the earned XP, you will need to play as the other side. Just have the guest controllers select Wretches and all jump the barriers on the way to destroying the e-holes and generator. Adds about 2:30 minutes to the match.

Progress is best checked by looking up the achievement: Main Menu > Stats & Awards > .

Please note that execution kills do not lend themselves well to Medic Revives. Some Locust do not offer alternatives such as the Corpser. Use the Grenadier's Lancer instead of the Gnasher. Sometimes it is better to melee (Scout and Kantus). Having revived players is much quicker than waiting for them to run back to your location.

If no one needs the achievement for revives, you may select any available map.

Select the map Ward if a player needs^{Above method still being perfected by BlackDragon3980, Peaches 518, Rainnin Death, KingNewf and NonKosherSalt. We will edit this solution or add in the comments any refinements.
Questions or comments are welcomed.}