How to maximize yield in a 120x120 tent with 600w lights?

Hi,

First timer here. If you would buy a kit like:

http://www.greenshorticulture.co.uk/categories/Grow-Tents/Secret-Jardin-Grow-Tent-Kits-and-Packages/Dark-Room-DR120-II-Grow-Tent-Kit/


How would you go about to maximize the yield without going hydro? I'm thinking a scrog with 6 plants but maybe you have a better idea?


Regards

Iamclovin