I rebuild all my kanger coils using a 1.5mm drill bit using 28 gauge kanthal. I do about 10 wraps, take it of the drill bit, squezze together with pliers and heat it so it glows nicely then put it back on my drill bit and place in the head to fit the bottom gromet and pin. I wick with Muji japanese cotton and have no problems with flooding, gurgling or dry hits.
These are the single coil "old style" heads for protank 1 & 2 and T3s clearomizers.
If you are rebuilding a dual coil head because the slits on the side are bigger I have found that if you use two 1.5mm drill bits stacked on top of each other to make an oval coil 3mm high and 1.5mm in width then wick (you do need more cotton) then this stops any leaking etc.
I never use a flavour wick, don;t need to.