My Colette is Korgal's Nemesis.
Concerning our last game, it was a Turf War in Flank Deployment. My schemes were: Search the Ruins and Deliver a Message. Korgarl's Schemes were: Breakthrough and Deliver a Message.
Other schemes were: Dig their Graves, Detonate Charges and Harness the Ley Line.
He has nearly exterminated my Crew. At the end of the game, I only have Cassandra at 1 Wound left and Colette at 2 Wounds left. He killed Angelica, a Showgirl, the Mechancial Rider and the Coryphee Duet. I only killed the Scales with two Doves (and buried Perdita last turn after she activated to kill her but it had no impact on the outcome of the game). He had Lady J., Scales, Brutal Emissary, Domador, Pale rider and Perdita. But as Kadeton said: killing is not winning the game, I won 7-4 (missing only the last point of Turf War). Without one mistake, Korgal could have scored one more point.
In my experience, Colette is killable (not easily but it is possible), you just need the right tools. For a Guild player, the Pale Rider is an awesome answer (the Dead Rider also for the Resurectionists) to that problem. With 14' of movement and a 6' aura on Turns 3, 4, 5 (if he don't use Fate Tokens for other things) which deals 2/3/4 IRREDUCIBLE damage, youy can deal 8 damage to Colette. Use it late in Turn 3 (after Colette activated), win intiative Turn 4 (cheat if necessary) and activate the Pale Rider first. Other solution for Guild players: the Jury and Recruiters who can target a buried Colette (her Def is only 5). It needs to have Focus in order to negate Serene Countenance but can be done relatively easily. Another solution is the Executioner. His attack stops DF Triggers. With Lady J., you pay the tax but it is a solution. I think Lady J. can be a good counterpick to Colette. As dannydb said indirect damage are great versus Colette and armored models (Coryphee Duet) as well as ping damage. I have bad memories of games versus McMourning (Poison + Sebastian) and Lilith (Black Blood).
Cocnerning another model which is often debated, The Duet is also killable relatively easily with the right tools. In this game, Korgal used Perdita who made Analyze Weakness on the Duet. Their WP is only 5, so quite easy to do. After that two shots from Perdita (Att 7 vs Df 7), ignoring Armor. Other models attacked. Repeat at beginning of Turn 3 and you have two Mannnequins at 1 Wound in place of the Duet (less scary by far). Well done Korgal!
@Kadeton and @dannydb: Concerning the "free" interact by killing in Turf War, it has been the case for one of my models. After that, I moved them in quarters already claimed by Lady J. to avoid losing other Strategy Markers when they died. I agree with you that Colette is a big distraction model and focusing on killing her is not efficient with the exception of Reckoning + Assassinate. It is not her best Strategy but I have already tried her in that case (for some poor to average results, I need to try Hoffamn and Rasputina instead).
Concerning handing out mass Distracted, for the moment, I rarely achieve this. At maximum, one beater has Distracted +2 or +3 during two turns (which is neat to negate the influence of a beater). Perhaps it is a matter of personal playstyle but I don't try to maximize Distracted and only see that as a circumstancial bonus. I highly prefer to swap places of ennemy and friendly models and to self bruy Colette and unbury her where she can score or negate points instead of keeping her in the middle of the ennemy Crew. Other players might prefer the Distracted game but it isn't absolutely necessary to win games with Colette.