The stairwells of the Boneshaker are never what they seem. Among other surprises, the hidden spike traps I've engineered can be set to stop any combatant.
Jackstrips deals 2 damage to all enemies when they change floor, which single-handedly ensures that several Support-class enemies in early Rings will not be able to ascend your train at all.
This includes all such units in Rings 1-3 (barring Armor Emblem) and some of them in Rings 4-6. In rings 7, 8, and 9 (The Last Divinity (DLC)), this Artifact stops being able to do much. Also, with The Last Divinity (DLC), Jackstrips's usefulness falls off dramatically once you've taken several Pact Shards as 2 damage doesn't have much of an impact against Pact Shard-enhanced enemies.
Jackstrips is a very strong Artifact if obtained early, removing Support-class enemies as a concern entirely for the first part of the game. This allows you to focus on your run's long-term needs. It should generally not be taken if seen later, or if your run is already in a strong position.
Despite Pact Shards and later Rings making this Artifact mostly obsolete, there are a few situations where it remains useful. It can allow Mortal Entrapment to work more reliably on higher floors. It strips Damage Shield off of enemies, making it more feasible to take Judgemental Fittings (DLC) from Malicka, and makes one of the variants of The Last Divinity's first wave (the one with three Apprentices of Light) easier to deal with on higher floors.
See: Version History