For same reason here in the US, I'm looking at the upcoming ceramic coils from Vapeston and Freemax. They can supposedly go into the mid-100s watts, and---- last 2-3 months each.
I don't know if they will fit a Herakles or Atlantis, but if they will fit the Maganus/Starre Pro, I suspect they will fit other tanks that use the general Atlantis type design. If not, I guess their new Ceramikus or Scylla tank will do. I see release date is around Dec 28.
I like cotton myself, so it might go into the drawer until needed.
I also grabbed a few extra batteries, a charger, trying some cheaper juice in bigger quantities, and maybe grab an extra mod, just in case something happens to my IPV Li 3, either mechanical or if I drop the thing, etc.
As for TFV4, if I know someone I trust to build a few coils for the deck, I don't think it would be too hard to rewick the cotton, but not experienced enough to advise on that.
Or, you could get an Aromamizer or Goliath, which have prebuilt OCC coil options as well as RTA. They look like coils that need rewick more than replace.
Not sure a TFV4 competitor (Mutank, Triforce, Arctic V8) would be any lighter on the juice...... they all have huge coils, and RBA options I believe. However, if supplies were to get scarce, I've never had issues finding coils for my original Arctic. Horizon Tech is large company with many tanks in peoples hands. Mutation was always a player for RDA and RTA, and is new to tanks with stock coils.