here is a script i use on some pretty bad sources:
strength = 4
fft3dgpu(bw=8, bh=8, ow=4, oh=4, plane=0, bt=1, sigma=strength)
fft3dgpu(bw=256, bh=256, ow=128, oh=128, plane=0, bt=1, sigma=strength/8, sigma2=strength/4, sigma3=strength/2, sigma4=strength)
If your gpu is older, you may want to trade out fft3dgpu for fft3dfilter, the 44 in AWarpSharp2 controls the line thinning(depth), decrease for less thinning.
you can actually preview the results as you edit the script if you use AvsP. best advice I can give is to load the script up in AvsP, and try commenting things out and changing values till you see what you like. In AvsP after you open a script just press F5 to load the preview window. When you make a change to the script and save it, just press F5 again or change the frame number by one frame.