You don't say the wire material.
Figuring SS316L for a worst case, .14Ω at the specs you gave (except figuring staggered fused clapton because that's what Steam Engine does).
VS Mooch's 30a rating for that battery. For 80w and SS316L you get 24a. You should be safe.
Kanthal .21Ω, Nichrome 80 .16Ω. You should be safe.
The mod's minimum of .05Ω limit would be pushing the battery's rating and over it by Mooch's rating. If you go by Mooch your limit is .09Ω