I do try to find a place for every stitch in the TAST challenge on my Paradise Flower print. Cloud Filliing Stitch was really difficult. This is the best I could come up with; no area filled with stitches but a narrow edge with the same technique as Cloud Filling.
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I have been looking for triangular shapes on my Paradise Flower Print, and I found a few triangular flower centrets. I used them for Triangular Buttonhole Stitch.
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Triangular buttonhole and Beaded Triangular buttonhole stitch
Linked Chain Stitch is useful for my flowers, both as an outline stitch and as a filling stitch.
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I am not very fond of threaded stitches. Threaded Cable Chain Stitch is no exeption. In this case a ligther and thicker thread would have been better. I might try again some other time.
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How to make Threaded Cable Chain Stitch
Google picture search