Right now, I have silica wick in a Smoktech Scar (dual coil) and I really like it. I tried doing cotton and a pseudo micro-coil in an AGI set up as a dripper, and that experiment failed horrible. I was going to re-do it with some boiled out organic cotton balls, but I just got too busy to get back to it, may give it a try when I next get a few days off.
This is something I wrote for another post. Disregard some of it of course , but this may help with your cotton.
I don't know if you're asking for a how to on cotton but I'll give you one anyhow. I got a bag of cotton balls at shoppers Drugmart for like 3$ and I think there's 300 of them ( wick for life at this rate lol ). If you look at a cotton ball it's actually rolled up like a jelly roll cake or whatever you call those things. I just unrolled about 10 of them so they were flat then boiled them for a few minutes. After that I take them out and squeeze most of the excess water out ( I did this wearing a pair of rubber gloves ). It's pretty hard to do much with it when it's wet but just try to get it sort of flat. Then I lay it out on some paper towel and let it dry for at least 24 hours. You'll find when it's dry it gets nice and fluffy and you separate it more.
Now when you separate it out to make a wick you can pull off a nice fluffy piece of it with lots of air in it. You really don't need much for a wick. If you havnt used cotton balls before you need way less than you think you do. Cotton can be very picky until you learn how dense your wick needs to be. To much air and flavor is affected and it can taste a little harsh because there's not enough pressure on the coil. Too much cotton and vapour suffers because the coil is being flooded so to speak. You want your wick to be sort of dense but still lose enough that it's very soft if you were to squeeze it. When you run it through the coil it should be lose enough to slide in and out easily but not too lose to the point where it doesn't take any force to do it. It really is a thing that you just need to learn from experience. Just twist one end up to a point and feed it through one end of the coil.
As for the Killer 705 I currently have a 30g kanthal micro coil in mine. I wrap on short drill bit and then mount the coil in the ceramic and then push it in to the base without removing the drill bit. Your coil will be sitting more 'above' the ceramic than 'in' it. Look back a little in this thread for pictures of a coil I made for my eBaron Dripper Pro and you'll get the idea. You could push it all the way in and run the cotton through the side channels but I don't think it's needed and I feel it could just choke the cotton so why bother.
As for how much cotton I tuck down inside the base of the Killer , I've been cutting it to about where the juice feeding holes are. If you have your wick density right the tails that you're cramming in there will be nice and fluffy with a lot of air in them. If even the smallest amount of them get juice on them it wicks beautifully.
Moving to cotton balls from silica really has changed my life when it comes to vaping. It's just so much better in every way.
One of the great parts is because it fills coils so nicely, when you want to change flavours you can just slide the wick out, carefully take out the ceramic wash it and torch it without a wick in it. Once it coils down you just feed another piece of cotton through and you're good to go. The coil in my Killer has had about 30ml put through it but the wick has been changed probably half a dozen times.
Sorry if there is spelling and grammar issues in this post, I typed it out on my phone.