deciding on a new set up ?

first thing HI im new to the site ,

right atm i have 2 x 600w (aircooled) in a 2m / 1.2m/ 2m budbox with a NFT system .

currently growing serious seeds Wr clones of my mother plant Canna nutes,.

im after some advice i seem to average around 22oz dry from this set up but i want to maximize my setup so im considering puttin the nft to one side
either setting up 4x Dwc bubblers or 4x waterfarms but was after some adivce on which is best and also how to do a diy rez

tree = x
light = 0 (600w) middle light being Vertical

x ... x
0 0 0
x ... x

would this set up preduce more yield then my previous set up

many thanks

ps i seen Heath do a set up which was recirculating aqua farms on HG but unable to find since any body point me in the right direction

quick diagram of the set up im hopin to make,

im just un sure on what pipes etc sizes i need for the flow / return pipe back to rez , also do i need to raise the pots up slightly higher then then the water level in the rez to allow for it to return ?

anyhelp on this would be much appreciated