Rise of the Tomb Raider

The easiest and fastest way is with the Acropolis level, trust me.
Select in the mainmenu Expeditions - Score Attack Mode - The Acropolis level - Tomb Raider Difficulty and as card the Dreamstinger Bow. You get this card automatically if you buy the dlc. Start the level now. Go forward to the cutscene and activate the enemies, run back to the tent and then shoot with the poison arrow in the pulk of enemies. Achievement unlock in less than 2 minutes.

You confuse enemies buy shooting poison arrows with the Dreamstinger DLC weapon. The weapon and outfit unlock when you complete the DLC in story mode, but you get the cards right away in Expeditions Mode. You do not need to play a DLC area to get this achievement.

I replayed "The Tower" main story mission on score attack on any difficulty. (The Acropolis level has more enemies and is better over all but I completed it on the Tower). I used the Dreamstinger V, Wraithskin: Master, Toxicity, and Tomb Raider cards. Almost every area of this level has a few good spots to get 3 people with one poison arrow. I got it in the first area when enemies were dropping down. Just equip the poison arrows and cloud up the whole level. If things are too crazy for you, the last room has 3 enemies talking with their backs to you. You can easily get all 3 in one shot.

Here is a screen cap of the score attack setup: (larger version linked under the image)


http://images-eds.xboxlive.com/image?url=imbJM3vwvcwNUnV76aR...

Here is a video clip of the end of the mission where you can get 3 in one shot. You will most likely get the achievement well before this part though.



With the Wraithskin outfit you should get these achievements in 1 run.









The 50 kills with the outfit might need a couple more enemies but you will be very close if you do not get it.

The easiest way to get the achievement is to go to Expeditions Mode and Select the level "The Tower" in Score Attack on the easiest difficulty. make sure you select the "Dreamstinger V", "Wraithskin: Master", and "Toxicity" cards before starting.

You will now want to play through the level until you crawl under a door way into the next area. There will be three nicely placed enemies right in front of you. Simply shoot a passion arrow right between them to earn the achievement.

Another place to get this is the location where you first rescued Nadia at the start of the Baba Yaga mission. At some point if you return to that location there will be 3 soldiers standing near the burning oil drum in the building where Nadia was hiding in the cabinet.

Provided you sneak up in them they should be standing together, so just pop a Dreamstinger poison arrow into the middle of them.

Load up the witch's cave level in score attack on adventurer difficulty and equip the following cards:
-unlimited poison arrows
-Dreamstinger V (you get it for buying this DLC)

When the level begins run down the stairs and into the water swim towards the boss battle.
After the skippable sequence the battle starts.
Toward your left 3 enemies will spawn; one with a sword and to archers.
I used two melee attacks on the leftmost archer and tried to punch him into the direction of the other one. This put him in execution state.
Do the same against the other archer trying to get them close together.
Wait for the swordsman to get close and shot an arrow to the ground. This should unlock the achievement.
If you fail you can simply restart the level and try again.

If you vote negativly please tell me why in the comments so I can improve my solution.