Does it work with radeon 19.6.2 drivers?
It will work, but with not max speed and can give many rejected shares. Full support up to 19.4.3 AMD driver.
Lol?
What you mean?
Drivers has nothing to do with stale shares. But will phoenix commands work with newest drivers like -tt etc
Just try and you'll see. Drivers has all! Miner knows drivers up to 19.4.3. On newer versions it can't use optimized kernels and use generic.
And on starting with not supported drivers miner shows warning about unsupported drivers and it warn you about possibility of many rejected shares due to unsupported drivers. You can try if you not believe me...