Best unit for Asdrubael Vect to go with?

What's the best unit for Asdrubael Vect to join? last edition i had him with a group of 4 incubi in a venom and it worked well.

Should i ditch the incubi and add bloodbrides or maybe trueborn?

bloodbrides are what I ran him with last edition (9 of them, including a syren w/venom blade and 3x razorflails), and it worked amazingly. The problem I had with it was that I caused so many wounds on the charge that I almost always wiped the unit I charged, or swept them... and then would be out in the open. Still, it's incredibly points effective imo, as even when I got left out in the open they never once failed to make their points back, at a minimum (and typically more). This unit will be even better in this edition, since vect gives his entire squad preferred enemy!

Has always been Wyches for me.

Why increase the cost of a unit that's already expensive? He's already expensive by himself, so keep the rest of the unit cheap. Take a PGL and Venomblade on the Hekatrix and just call it a day. Or an Agonizer as MEQ killer.

I just came off a game where I ran Vect with 5 Incubi (Demiklaive and Onslaught) and a Haemy (Flesh Gauntlet and Liquifier). They absolutely dominated. I rolled through a Blood Angels assault squad with a Librarian and Sanguinor in one round without losing anybody. Good rolls helped, but everybody getting Preferred Enemy makes a lot of your rolling good.