Like some others have said, it might not be the disc, but the throw. I'll try to elaborate a bit. Hyzers generally have a lot of speed left when they hit the ground, and that means a lot of kinetic energy. Depending on the surface - and the disc - some of the kinetic energy is dissipated when the disc hits the ground, but what is left can translate to skips, bounces and rolls.
For a throw that always sticks where it lands, you want to land the disc with as little kinetic energy left as possible. This is achieved by throwing the disc nose up, so the air resistance slows down the disc, and in ideal case it pretty much stops in the air before landing on the ground. Really overstable discs tend to fade and fall out of the air before the forward momentum is gone, and also they gain sideways momentum during the fade. That is why I recommend fairly neutral discs for touch approaches. Sometimes even neutral discs need a little bit of anhyzer to keep them in the air until they stop. You basically want the disc to hover to the ground.
I recommend you try this before you search for the magic disc. Play with the nose up angle, the anhyzer angle, and height, until you get a flight that stops in the air and hovers gently to the ground. It is very possible to pull it off with your current Aviar.