Concept for Killer: The Engineer
I will rebuild you! I have the technology!
You modify a downed survivor with machinery, randomly enhancing an ability while crippling another, randomly increasing Repair/Healing/Sabotage by 10% while randomly decreasing Repair/Healing/Sabotage by 20%. It is possible to, for example, get Repair speed twice, resulting in -10% Repair speed.
Piñata: You booby-trap 1/2/3 generator(s). The process takes 15 seconds per generator, and has a slight/moderate/tremendously difficult skill check every 5 seconds. If you fail a skill-check while setting the trap, you get stunned have to start the process over. When a survivor fails a skill-check, the explosion sends shrapnel flying for 5 meters around the generator, injuring anyone in range.
Power Drain: 1 additional generator is required to power the exit gates. 1 additional generator is spawned at 45%/30%/15% progression.
Reconfiguration: Generator skill checks are reversed, moving counter-clockwise, the needle moving 5%/10%/15% faster.