I have some Dynext RitekF1 media ID DVD-R’s and know if anyone knows the best write strategy to use with these. I tried G05 and g04 and my average pi and pif were crazy. please help
You got RITEKF1?! 
Didn’t know those were in general availability already. May I ask why you’re using 16x -R media on a drive rated for 4x -R? 
I’m going to guess that the “F” means that they’ve moved on to a new dye type, and that would be why G04 and G05 won’t work so well on it. If that’s the case, then, unfortunately, I have no idea what strat would work for it. And seeing as how this disc type is extremely new, I would guess that not many other people have tried stuff with it.
Or it could just be that the disc is a piece of junk–I read about some early tests of the RITEKF1 on 16x drives like the NEC 3520 and BenQ 1640–all showed pretty bad results. This is Ritek, after all… 
that is awful, if anyone does see some good results please let me know!