I'm using non-resister ni200 in a temperature controlled mod so a bit difficult to compare except for size of the metal mass.Let me borrow the always accurate mind of Craig and ask:
If I am using twisted 28 gauge 6-7 wraps is that the same as using non twisted and doing 11.5 wraps? I guess mine would be .5 wraps too because they have to be one half wrap to accommodate the way its built.
Twisted 28 gauge would compare to 26 untwisted but I'd say your on to it.
But I think you would do better with untwisted 28 or twisted 30 at that wattage, it would get up to temp much quicker.