The way I usually do it is I cut one length of round wire and one equal length of Clapton wire. Hold them side by side and wrap them around your rod as though you were wrapping a plain parallel coil. Keep the wires from crossing each other.
Since the Clapton wire is 26/36, I'd use 24ga round. The intent is to get the two wires to be as close to the same diameter as you can so your grub screws will trap the two leads evenly. Do be sure, when you tighten the screws on those wires, that they are both trapped and cannot spring out and cause a short.
It's just like wrapping a parallel coil except one wire is plain round and one wire is Claptoned.
You'll probably need 4 or 5 wraps. I think my coil is 5 wraps and reads 0.31 ohms, which is right where I like it.
I've not used N90, but you might end up with a snarly beast of a coil if you do use it in this.

It will ramp up fast, I imagine.