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Eight sharpeners in a row? Really? I can't come up with anything that could possibly benefit from that. Surrealism, maybe?
As a newbie, stick to 1s: One input, one deinterlace/ivtc, one smoother, one sharpener, one resizer, at most. Tweak the ones you have, first, and then add more one at a time, tweaking them, so you'll understand when and where to put them. Your way, it's just stacking turning the artifacts of each filter into more pronounced artifacts in the next.
Purely from a CPU standpoint, QTGMC is probably nearly 50% of your processing time, and two instances of NNEDI3 probably the other other 50%.
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