I've been growing sativa dominants for the last two decades and ScroG is the way to go with those girls.
A trick I use when a top is getting too tall is just to roll the stem firmly between your fingers until it gets soft and the top flops over. Might have to do a couple inches worth or even a couple of node spaces so it doesn't break but even if it splits open the top still grows fine and the buds lower down grow a lot bigger as if you topped the plant. I've even had the back of the bend break right apart and the top still grows as if nothing happened. I've literally done it dozens of times over the last 20 years and never had a top die.
Got me some nearly pure indicas going and plan to mainline them so need to switch gears with these girls.