So, you want info on how to get more performance from the AGI set up as a tank.
I've been using a AGA-T for a few months now. I have it setup with a wick hole drilled to 1/8" and an air hole drilled to 1/16". I make my SS wick as solid as possible and use 27 gauge Kanthal in a 3/4 wrap (comes in at about 0.6 ohms) using the drill bit method, sliding the wick in after. Leaves the coil just lightly touching the wick. I don't oxidize the wick with flame, but pulse the battery after assembly.
I'm getting great flavor from my juices but I make my own so I modify the recipe according to the device I'll be using it on. I position the air hole right beside the coil. That definitely improves flavor compared to having it elsewhere at the cost of less TH. I don't know if the flavor as a genesis will ever be as good as a dripper.
I think the RBA forum would be a lot more help to you. Some of those guys know all the ins and outs of these devices!