The Below Paragraphs outline MY experiences w/building with thin Kanthal wire... I want to add this header-note, before you begin reading the rest of this article. Where-ever you see the number 30g, please know that that 30g is interchangeable with 32g wire. Yes, I did use 32g wire almost exclusively, jussst as-much as I had used 30g wire.
Both 32 and 30g wire were my preferred gauge wire over the last 7 years of my vape-timeline. thank you 4 yer time...
I enjoy spaced 30g coils in most of my A7 atty builds. If I'm not doing spaced 30g then I'm obviously into the whole micro-coil thing, with a wire close in gauge to 30g kanthal... Usually it's going to be 30g or 26g if I've even got any. (I usually don't) Throughout my vaping lifetime/timeline I usually had 30g kanthal and I almost NEVER had a thicker wire. I depended solely on the kanthal wire that CAME with the various RDA RBAs and RBT RBAs that I've purchased over the years.
For instance, my AGA-T rebuildable Genesis Tank RBT/RBA came with 30g wire. I used that 30g wire on every damn build i did for that Aga-T deck until I had ran-out. I got more with other RDAs or RBTs and I used it up no problem. I purchased a larger ream of 30g Kanthal Wire from thehouseofvapor back when I was deep-deeep into DIY e-liquids and building my RBAs. I solely used 30 gauge spaced kanthal coils back then and I had no intentions of ever moving toward heavier gauge kanthal wire. No desire at all. I like using 30g because it takes LESS JUICE to achieve the same Throat-Hit/Good-Flavor/Cloud-Production as a thicker gauge wire uses to achieve those same traits and results.

I <3 30g heehehe.
I just recently received several thick gauge reams from a friend of mine, & i am very excited to finally be TRYING a thicker gauge wire, for the very FIRST TIME in my entire vape-timeline!! SERIOUSLY! I've honestly built with thicker gauge wire LESS INSTANCES than I can count on two hands.

I am MUCH more experienced in 30g thin wire, spaced coil builds, and 30g thin wire micro-coil builds. (via a coiling device, which i received as a gift for having come back to vaping, from my mother. this time around, she is MUCH more supportive of me, because she was down-right SICK of the smoke in her house) So, while in the past, my mother used-to REFUSE to buy me a bottle of juice, & she would go out & come-home with a big bag of tobacco and filter tubes for me, even-though I had specifically asked her to pick me up a 30ml bottle of BuckNaked 12 or 18mg in any flavor.... So in that way, she would sort-of force me into going back to smoking, all because she just did-not understand vaping & did-not trust it. I am happy to say that my momma finally understands that if she wants a smoke-free house, she's going to have-to support my decision to vape, rather - than smoke cigarettes... I am proud of her for finally doing some news-watching & coming to the conclusion that vaping is going to be much healthier for her son in the long-run.
Now, like I said, 30g is my safe-spot, & it makes me feel like I know what I'm doing. Now, the differences are abundant between a 30g and a 24g build. First, namely, the legs- The LEGS in a 30g build need to be "protected" or they WILL snap under heat-pressure. Yes, should you build a 30g coil, (and we're NOT talking-bout' these ridiculous two or three twisted-wire builds) a 30g coil- Every SINGLE time you do, you are at-risk of hot spots that WILL snap, because the wire is so thin. Now, if you are familiar with 30g builds, you would know that the weakest link - the weakest spot - in the entire coil, is actually the legs between the coil & the two posts. Now, with a 30g build you have two options with the legs... Option A: You can puuullllll the ends of that coil through those two posts as faaar and as haard and as tightly as you possibly can. This eliminates the legs all-together, for the most-part. It makes it so that the coil starts at the negative post and ends right at the positive post, which means NO coil segment is succeptable to receiving more heat without means of dissipating said heat... Option Number B: The wicking method. This method applies wicking to these hot spot legs. You simply tuck your wick UNDER your 30g coil's legs in-order to prevent the legs from becoming any more hot than the middle coil-section of the coil. The saturated wick acts as a heat-sync which keeps the coil's legs MOIST, which in-turn prevents the legs from snapping from heat. This is a fantastic method that I personally employ, in addition-to the no-legz coiling method.. I simply use BOTH of these methods as-often as I possibly can. Some RDAs and tanks are going to vary and you may-not be-able to do a coil "with no legs" in some. But I do my best to eliminate the legs all together whenever possible, with my 30g wire builds.
Now, I must say 1 more thing... WITH my 30g kanthal coil builds- I do my best (usually) to create a micro-coil. Whether or not that micro-coil attempt turns-out as a tight micro-coil, or whether or not it turns up as a SPACED micro-coil, well, that is usually dependent entirely of the circumstances and what winds-up happening as I'm building the coil. FOR EXAMPLE- If I build a coil that just-so-happens to be a bit tighter than I would normally make, and then I attempt to STRETCH that coil in-order to delete the legz, so-to-speak- it can space the coils. This is because a tight 30g coil that is stretched-out is GOING to space-out, unlike with a 24 or 26g build, where you can basically manipulate the thicker wire to NOT space-out/stretch.
so there you have it folks- have at it! I dare you to get out there, go find your 30g wire, dust it off, and employ the above techniques to build a FANTASTIC low-resistance 30g kanthal coil that's going to deliver awesome amounts of vapor, spectacular flavor, and which is NOT going-to use-up ALL of your juice, quite as quickly as saaay- A LR 24g Kanthal Coil.
please ENJOY the above 30g coil methods and please, enjoy the vape journey!!!

have a good night everyone- enjoy your dinner, your family, loved-ones, & sleep well.