I keep picturing some sort of dish of sorts or a cone shape coil to keep the oil in the hot place
I've been playing around with ecig atomisers for a few weeks now, and one of my attempts was something a lot like your idea of a cone shaped coil - it worked well, if only for a few days. It gets clogged up real quick. Granted what I'm putting through it isn't primo so ymmv if you have a nice clean product.
I took apart an atomiser head for a V-Hit type B atomiser, though any of the "nail" type atomisers will do. you need a pair of pliers to open them up, and sometimes the ceramic cup is broken by the time you get inside, but I wasn't using those anyway.
After pulling the old coil/cup out, you're left with a tube with an airhole and pin right in the bottom. I got some 400 steel mesh and made a tiny cone with a hole in the tip, cut and shaped to rest around the outside of the tube. Then I got some ekowool 3mm, wetted it out and teased it into a cone shape, and lowered it in with tweezers and padded it into place. I then made a coil with some ribbon wire but (oh so carefully) wrapped it tightly over itself so the end product looked more like a watch spring than a coil - careful tugging of either end made it into a spiral.
The coil gets dropped in, the ends of the wick are trimmed, and a hell of a lot of teasing and poking to get everything aligned and making sure the coil is pressing out onto the wick enough and isn't shorting anywhere...
Here's a quick "cross section" pic, though I've shown the entire coil:
Then there's a cap on top which clamps down on the wick at the top, and hold down the -ive end of the coil to the metal tube.
Looking down from the top it looked like a vortex.
The end result vaped quite well, but got clogged up quick. It sometimes needed a little warmup and a pull on the ecig to pop through any congealed/settled oil, but I never had a problem with any oil coming through the airhole in the bottom or leakage.
Right now I have an origen clone I'm playing with which is a different beast entirely...
...though I've only got PG+menthol flavouring in there at the moment, while I'm figuring out the best coiling method, and the best way to mix my oils (my first attempt was... shall we say, interesting).