The BVC i.m.o. is the best coil for mini Nautilus.
You could potentially rebuild an Aspire coil (if you know how to do it)... you can tweak a few more horsepower from micro-coil and cotton wool, but it's time consuming and not as straightforward as rebuilding a Kanger subtank OCC.
I did rebuild a few, but I get bored of drills and little bits of wire in about 180 seconds.
