Reach Challenges: Heroic Demon

This is in response to a challenge earlier this week to get 10 Elite kills in Firefight Matchmaking.  There are no Elites in Gruntpocalypse (obviously).  In the other single-player Score Attack playlists (Firefight, Sniper Attack, Mythic Attack), there are at most six elites in the last wave and it can be really hard to get there with enough lives to kill them.  The best place to get Elite kills are in standard Firefight matchmaking, in Rocketfight or Sniperfight.  I prefer Sniperfight because you can just hang back and pick off the Elites.  On many maps, there are sniping locations where the rest of the enemies will largely ignore you and you can just focus on your personal objective.  Some examples:

• Waterfront: Across the field on the cliff that overlooks the entire map.  The enemies will actually largely ignore if you hang out here quietly.  The biggest threat in Sniperfight is the Focus Rifle Jackals directly to your left.  I recommend loading out with Bubble Shield so that you can deploy it as soon as the Jackals start shooting.  Then you can aim at them, creep out the shield, and fire as soon as your gun pokes out while you stay safe.
• Courtyard: Leave the spawn room and run to the far right of the map, camping out behind the large propane tank-looking thing.  As long as you don't try to spawn kill the Phantom drop ships and stay hidden behind the tank for a few seconds, the enemies will all funnel towards the middle of the map, away from you.  You'll largely have easy pot shots at whomever you want to kill with basically no repercussions because the other AI enemies won't know where you're shooting from.
• Beachhead: From the spawn, head up the stairs to the left immediately in front of you and camp out on the balcony there.  The rest of the players will generally run around the map like a-holes trying to spawn kill so that you can get your snipe kills without anybody coming to bother you.  Bonus?  You'll have the easiest view from there for the Wraith kills.  Wraiths take 4-6 shots from a sniper rifle to kill.  I recommend reloading after 2 shots when Mythic is on so that your teammates don't steal your tank kill.  You get huge points, 2 Elites per kill, and can work on your Firefight commendation.  Active Camo is good here so that you can cloak and take out the Wraiths without worrying about them seeing you and shelling you in response.