Corrupt Intervention (most important for tracking survivors in the early game), Pain Res, PGTW (instantly go through tunnel, find generator noises, and use PGTW on gen). 4th perk can either be UW, Grim Embrace, DMS. Beware that UW isn't as good for Xeno due to her 24m terror radius in crawler mode and lack of terror radius in tunnels, so I suggest it the least. I recommend GE the most. Pick your poison.
Best add-ons are Kane's Helmet, Emergency Helmet and Star Map. Kane's Helmet is easily her best add-on because it's basically Sloppy Butcher for the tail.
ait as a decent nontoxic killer here ya go
lethal pursuer, nowhere to hide, and any two more aura perks of choice
p.s. works on all killers