I recently I did a write up of information I data mined in an effort to learn more about the Quick Kill Bonus mechanic that the 2K folks talked about in their awesome write up of scoring in story mode last week. The goal was to come up with an infographic that would allow high score runners to quickly see which enemies they should focus on (and shouldn’t focus on) to maximize their high score in any given mission.
I’ll keep things simple here, but if you want to read deeper, do check out my other post.
Enemies can be broken into 5 different tiers where more challenging enemies are worth more score. Popcorn, Basic, Elite, Champion and Unique/Boss.
Popcorns will not reward you any bonus score no matter how fast you kill them and can be killed without any time penalty.
Unique or Boss tier enemies for the most part will be very challenging to kill within the 25 second time limit given most boss fights play out in phases which you cannot speed up or skip. I don’t know if the Quick Kill timer pauses during such phases but it doesn’t feel like that is the case meaning there is very little point in trying to kill them quickly unless they are something like Warlord Nix who doesn’t have any damage blocking phases.
All other tiers have the potential to be killed within a certain amount of time to earn a Quick Kill bonus which adds to the base score you get from killing an enemy. Once the time limit runs out, the amount of bonus score you get starts to decay very quickly but you can still get a portion of the bonus if you kill them quick enough.
I highly recommend investing in shield penetration and using a character/build that is able to land critical hits in quick succession (Marquis) or do massive damage (Montana) if you want to get a high score (especially if playing solo or with fewer players).
The values on the infographic are for Normal and Advanced (playing on hardscore won’t affect these values). So for instance, a Popcorn enemy gives you 25 score on Normal and 31.25 score on Advanced.
 Uploaded this to my website so you guys can search it and stuff.
There are several Elite tier enemies which can be one-shot without the need of a special build, being MX.Deadeye, Guardians with their chests exposed (ie Galactic Emperor fight) and possibly others. These guys are worth up to 500 score which is 5x their base score of 100. Champions are also worth 5x their base score but are much harder to kill. These 2 tiers are where most of your Quick Kill bonus (and mission score) is going to come from.
There’s also a Varelsi Skulk Menagerie (which as far as I know only spawns once on The Saboteur, but might show up in DLC missions) which has Skulks on its back. Apparently each of these can receive a Quick Kill bonus so taking the time to kill them one by one will net you more score than simply killing it outright.
There’s a variant of Skulks that moves a lot faster than your standard Skulk, internally known as a Skulk Runner. These guys are also apparently eligible for a Quick Kill bonus (extra 100 points, so nothing too much though).
Letting an NPC kill an enemy you have damaged will result in only getting half the score you would normally get from them So definitely make sure you don’t let them steal your kills (push them off the edge if you have too ;))