Your coil looks great and so does your wicking.
With cotton I cut my wick pretty much same as you do and to ~2-3mm beyond the edge of the deck. Lately I have not been trimming any additional material off of my wicks for the X. Previously I've trimmed some off the top, from the sides and both. All 3 worked for me. I haven't noticed any difference in vape quality between no trimming and trimming of the wick. I never comb cotton or rayon.
There is a video from AVS where the owner offers some tips for getting longer life out of our coils and wicks. He gets a month or longer on a wick and his coils last up to 6 months. He vapes sweet juices.
I think one of his best tips is to continue inhaling for a couple seconds after releasing the fire button on your mod. It serves to cool down the coil and prevents the wick from getting singed. When you take a hit, release the fire button, and stop inhaling in one motion your coil is still very hot which continues to fry juice and singe the wick. Hence the sound you are hearing for a couple seconds after.
I mention this because of your comment
"when I release the firing button you could here the cotton being vaped for a couple seconds".
His tip works and is probably why I get longer wick life. I have a wick in the X I am vaping now that is approaching 1 month old and it still vapes excellently.
See starting 13:49 in the 2nd video on this page:
Stainless Steel Coil & Wire Instructions and Tips
Maybe try that technique and see how it works out for you.
Both videos on that page are very helpful as are the written tips he offers on the page. Note in the 2nd video his preference is for wicking that is not too tight in the coil. Whatever works for each, just works.