Thanks for your Answers, Olham!
I think I have found one great step to my personal final Solution. I've tweaked the ConfigOverrides.XML. I didn't just know what else to do...Sure it is a difficult way and it needs time and patience, but the Results are much more better now. WOFF now runs nearly as smooth and liquid as it was in OFF Phase 3.
I've changed the D3DSWAPEFFECT to Copy_Vsync, and the Index and Vertex Buffer Pools to D3DPOOL_MANAGED. These are nearly my same Settings as they were in OFF HitR. Now I have solid 50-60 FPS with my Sliders on 5,4,4,5,5, and even with 16x Time Acceleration my FPS are at 20, and it runs smooth as silk. Microstutters are eliminated at 95%.
My NVIDIA-GPU Driver has 32x CSAA and 4x Supersampling. Triple-Buffer ON, VSYNC is ON. Pre-rendered Frames are at 5. Anisotropic Filter at 8x.
But still some small (really small) Stutters when I fly over the Frontlines. Will go on and see, how I can reduce this...
I know this was the wrong thread for this...Sorry...