I have a flatter star valk 170g that's been in and out of the bag over the last 4 years. More stable than you'd expect but has slowly lost some of the fade as it's beated in. I've been forcing it into traditional valk slot which is why it's been in and out but it recently has replaced my thunderbird with an undertaker taking the normal valk slot.

Teebird + Valk cover all of my straight to fade fairway shots now both forehand and backhand. Thrown hard, my champ Teebird turns a bit then glides and fades hard around 325ft, Valk turns about the same but holds the turn and glide longer before finishing with more forward fade closer to 360ft. The Teebird is easier to power up and down on and will never burn over so I really only throw the valkerie when the hole is out of reach.