I tried every size of wire in mine until I got it just right. I'm no expert, don't know what the res of my coil is - I just know its working great and plenty of vapour + the battery doesn't get hot. I've got the finest grade wire I could buy 0.15mm I think, only a couple of wraps around the mesh and a slightly modified centre post (I posted a thread here about it with pictures).
I'm completely satisfied now, love the AGA-T2 because it was hard work, and it taught me so much experimenting with it.
*edit, I did have a vamo but I broke it. I personally don't think rebuildables work well with VV/VW
mods, i'd stick with mech or VV only. My vamo was always giving me low Ohms errors, tried to fix it because I followed a youtube vid, (stupidly) and it ended up in the bin.