The best way to tank is the Spurs' method. Do it for one year by sitting out key player(s) for enough games like they did with Robinson, that you hit the lotto.
This means player development for guys like Fab Melo, T-Will, Shav and Courtney Lee (if he stays), which will help them grow and lose us games. Ideally you keep Green, Rondo, Smoove(?), Sully and Jordan on the roster for the following year but play Sully, Rondo etc sparingly enough.
Getting a top lotto talent, further tweaking the roster as needed and rolling it back with the aforementioned players and we're okay. We would likely have 2 first rounders next season depending on which pick the Clips give up.