I also suggest another Wraith, something like a 170-ish Star Wraith, preferably in the stiffest possible Star plastic you can find. This will start over-stable and beat in straighter and straighter. Keep both Wraiths in your bag, as they will complement one another.
Note also that, in the evolution of many disc golfer's throwing techniques, we often first learn to flip a disc over by torquing it off-axis, which makes the disc wobble off-axis out of your hand. This wobbling will dissipate with time as the disc flies. The time it takes for the wobble to dissipate depends on the disc, the plastic, and the amount of wobble at release. For a Wraith, it takes about 2 seconds for this wobble to dissipate, which is relatively fast. Anyways, while it is wobbling, the disc "flips" over quickly, but then once the wobble is gone it settles into a straighter (more stable) flight. The Wraith is very forgiving to being torqued over (and to release errors in general), which is the main reason it is an excellent choice for a golf driver.
But, what you really want to have in the long run is a throw that is clean and has no wobble. This is because it isn't always easy to control the torquing of the disc over, and there is a bit of randomness to whether it will settle into the line you want. You'll get much more reproducible throws without torquing it over. Without off-axis torque (OAT), the only way you can get a disc to turn over is to get it over its stable cruising speed. Then as it slows it will straighten and then begin to hyzer as it slows further.
In order to eliminate OAT from your throws you will need to drill with some discs that are far more sensitive to OAT on long throws, such as putters and some mid-range discs. The most OAT-sensitive disc that you can learn to throw well over 300' if you can eliminate OAT is the Comet. You might want to try that out for a while, maybe play catch in a field with one, focusing on clean release and smooth form. Then go back and apply that to your Wraith, and I think you'll get a beautiful result, and also be able to drop many strokes off your round total.
Drivers: Starlite Wraith (158g), Gummy Champion Leopard (150g), 1st Run Z-Talon (150g)
Mid-Range: Star Classic Roc (146g), R-Pro Roc (157g)
Putt/Approach: Legacy Protege Clozer (158g), Glow DX Aviar (150g)