If you choose to use twisted you have to factor it in as up one gauge for every wire.
28x2 twisted is about the resistance of 26
30x4 twisted is about the same as 24 30/28/26/24
I'm sure you've realized gauges jump by 2 numerals.
There is a calculator for how many wraps to do with a give gauge or twisted over at steam-engine
I don't expect this to be too much value necessarily now. However Ina. Few weeks or a month you may find it helpful to have heard this previously.
I personally use twisted whenever I can. I use 28 gauge a lot and for kanthal I have been searching unsuccessfully for 30 x2 twisted. Can't find it. So for now i use 28x2 twisted and wrap for 26
Again maybe not helpful now but in the future. I actually do believe that twisted wire leads to better flavor. And it's relatively significant in my experience. But I vape moth to lung. Like cigarette smoking and I choose flavorful atomizers.
Here is the steam engine coil wrapping calculator. Hope it helps.
Coil wrapping | Steam Engine | free vaping calculators
Ps if anyone comes across double twisted 32 or 30 or Clapton wrapped 28/32 28/30 etc. please let me know. I'd order enough it would be work getting from the uk or Europe. It's nowhere here. And not on fasttech that I've found. My gem tanks won't really take larger than 28. 26 pushed.