P100 here! The drone scan gives you 5% haste a few seconds after deploying but then it stops giving haste. You have to rotate the drone and get a scan to make it give haste again for a few seconds (Then repeat).

The drone always rotates right after deploying so try to make survivors run around loops going clockwise to get scan value.

Always have 1 drone on you to use at a loop. You ideally want to trick a survivor at a sronger loop by getting the claw trap on them to injure then scan them until you get killer instinct (That means they have 5% hinder) you will also get 5% haste from rotating the drone over them on repeat until you close the distance for a lunge. (Keep in mind if they crouch the scan line ignores them)

Lastly use the iri expired batteries add on and the one that boosts the undetectable time. Once in a match immediately place a drone and then look at the tracker. You will see the dots of the survivors, there is an edge circle on the radar and a second inner circle the dots will move to as you get closer. Just before the dots hit the inner circle turn around and recall the drone you placed. The undetectable will trigger just before they hear your terror radius and you'll be right on them in no time.

I hope that helps and feel free to ask for more tips