I have run across Chimaeras now and I have to say I'm not overly impressed.
I use the Phoenix ships as well as Biggs up front with Boba and TIE as backup and I mince similar opposition rocking Chimaera barring shenanigans. The two Phoenix ships alone can lay on loads of debuffs which means MOAR fun.
Plus you have a near guaranteed TL with Phantom, maybe two. Then bring Boba in and that's possibly more. No Vader in my possession as Advanced has decided not to be in the store for a while.
My 4* Trixy with it's G9 Tarkin has been eating Chimaeras for breakfast. Ackbar gives me more hassle.