Dicodes' Resistherm NiFe30 (IsabellenHütte)
This is a new wire that Dicodes are popularising along with their new mods. Its coefficient is 0.0032, very similar to Titanium.
They are calling it "Dicodes' Resistherm.." as if they invented it, but they did not. It was created by IsabellenHütte - their info page on it is here: RESISTHERM® - Isabellenhütte Heusler, and here the datasheet.
In one of their manuals Dicodes state that it is easier to work with than Ni200 (what isn't?) I don't know how it will compare to SS and Titanium. Its resistance at 29G is 5.5Ω/metre, making it less than Titanium and Stainless Steel but 4x greater than Ni200.
The data sheet lists it as usable up to 600°C (1112°F) so it certainly has a far higher ceiling than Ni200.
One potential downside is that it currently only exists in one size - 0.28mm/29G - and that may be the thickest that is available any time soon. The manufacturer states the wire goes from 0.02mm to 0.25mm/30G, so Dicodes have already made it available slightly thicker than the manufacturer normally offers. Maybe 32+G would become available in future, but it seems unlikely that 28 and below will, at least unless/until it becomes very successful for vaping.
I have ordered some for testing (€13/10m !!