There's a really good trick that people often miss with the Performers:
Siren Call your enemy, making them walk towards the Performer. You want them to walk into melee range of the Performer - doing this makes them paralyzed. One they're paralyzed, the Performer has a rather nasty (1) Action called Poison Gift, which poisons a paralyzed model within 2" and gives it Poison 4. Anyone who has been on the receiving end of this knows that Poison 4 is nothing to laugh at.
The trick of this is managing to get the Siren Call off. You're playing Showgirls, so positioning yourself where you need to be isn't that hard - the trick is in the casting cost. It has a casting cost of 12 (your Performer has 5) and requires :masks. This means that you will need to flip or cheat a 7+ :masks. You can make this easier on yourself however, by use of a Mannequin.
Mannequins have a (1) spell called Tricks of the Trade, which needs a 9+ suitless to cast. You discard a soulstone (once again, you're playing with Colette, this isn't such a huge deal) or sacrifice the Mannequin and then give +:masks to a Showgirl within 3" of the Mannequin.
Now, you might be thinking to yourself: "Man, this is a really expensive combo. If I don't have a 7+ :masks, then I need to spend a 7+, a 9+, and a soulstone or a Mannequin. And the enemy can still resist it with wp, so I'll want to use a really high card to make sure they fail the resist! This just is not worth what I put into it."
And that's where you're wrong. Because with this combo, that enemy model is going to take 7 wds before it gets to spend a single action. On the next activation after it gets paralyzed and poisoned, it takes 4 wd and (due to paralysis) ends its activation right there. Next activation, it takes 3 wd before it can act. This is often enough to kill whatever model you did this to. If not, they still take 2 more damage the next activation, and then one after that. Basically, getting this combo off on someone is a death sentence for that model.
Poison 4 + Paralyzed is not to be trifled with.