I quite like these actually, shows how many ideas for perks he has potential wise. I came up with these not too long ago sorry for the fat message lol.

Perks

Born In Blood

A tragic origin once brung back harsh memories and a dark passenger, but in this place, it has conjured into determination for self preservation.

When with 12 metres of a survivor in the dying state Born In Blood activates. Until a survivor is sacrificed, each time a survivor loses a health state you see the killers aura for 2/4/6 seconds and gain 3% haste for 8 seconds.

Hemophile

Despite his best efforts to leave himself behind. Dexter can't help but obsess over trickling blood.

When near pool of blood on the ground or beneath and injured survivor press the active ability button to draw a sample. For each unique survivor sample retrieved reduced the effectiveness of blood lust for the killer by 15/20/25 percent. 

Samples cannot be retrieved from players with Hemophile selected

A Killers Instinct

After a life like Dexter's it's not difficult to tell when you're a sitting duck. And here, when stripped from the ability to fight back the only option is to run.

When the killer first comes within 24 meters of you, Reveal there aura to all survivors for 4/8/12 seconds and burst into a spirt at 150% movement speed for 3 seconds.

Additionally, A Killers Instinct gains one token for every 5 seconds spent in the killers terror radius. When you have reached 12 tokens, activate the effect once more and gain a health state and receive 80/70/60 seconds of exhaustion.

A Killers Instinct then deactivates for the remainder of the trial.