I'm quoting you in here, as there's other Gear rta users who can help.
For me, it's as small a coil as possible for a cool vape. I use 3mm id ka1 0.5x0.2mm flat wire (which is only in NZ)
I tried 3mm id Geekvape ni80 3*30/38 5 or 6 wraps, which was good at 30 watts, but did get a bit warm for me. For someone else, it would possibly be perfect.
Another option is a 3mm MTL fused clapton @ 25-30 watts. Vandy vape and Coilology both do ni80 2*30/40 (coilology) and 2*30/38 (VV)
Also have a look at Flat wire. For its mass, it has a lot of a surface area. So you get the best of both worlds - low heat capacity with more surface area.
NiChrome Flat Wire 0.8x0.2mm / .031*.008" - AWG 25
This has the ramp up of 26g round wire, with the surface area of 24g.
These guys also sell Fused Clapton wire:
https://www.zivipf.com/epages/63862298.sf/en_GB/?ObjectPath=/Shops/63862298/Products/"2 Fused Clapton Heizdraht"/SubProducts/"Fused Clapton Heizdraht 5m SS 2x0.32+0.2"
and prebuilt coils:
Prebuilt Coils
Wow!!
Lot's of good info right there,thanks for taking the time to give me some options.
Thursday I gotta place an order for a new 21700 battery,i'll check to see if they have any of those coils in stock.
Cheers