The Flux would be my pick. My buddy and I have each owned almost every modern throw, and the Flux is tied with the Akita for our absolute favorite. Prior to these two, we’ve never had a concensus favorite.
The Flux is astoundingly good - fast, light, floaty, fast, stable, powerful. It has an addictive quality that makes it tough for me to get away from it for any length of time. It’s my desert island throw.
Mythril’s body of work is fantastic. It’s a real shame to see them go, but even more reason to get a Flux. Every Mythril throw has been excellent. But, with the Flux, it’s like Michaelangelo sculpted David and then walked away with a mic (trowel?) drop.