I’m a big fan of top early just after the fourth node. It’s not specifically mainlining but training my girls to have a wide open canopy. After I top I always make sure the girls have a good drink and are not bothered for a day or two at least.
Now that they have rested and had a good meal of 2.5 ml per liter. Now a bit more LST to make the grow where we need them to be.