Dead Set is a challenge in Regolith Range worth 10 Badass points, in which Deadlift must be defeated without the Vault Hunter's shields becoming depleted at any point in the battle.
Strategy
Killing Deadlift quickly is a key to completing this challenge, and the strategies for completing the Insulated challenge apply here as well, since the electrified floors are one of the biggest hazards in terms of completing this challenge.
The shock sniper rifle given as a reward for Tales from Elpis can be extremely helpful in ending this fight quickly.