Perfect Mainline End look for maximum yield

That's a judgement call. You could lollipop it and prune the lowest branches. Or you could let it grow and only prune top leaves that are blocking light or air flow. You're growing outside so I would choose the latter of the two options. You should be getting plenty of light to get good buds a bit lower than an indoor grower. Lollipopping MIGHT increase potency slightly, but I wouldn't give up the extra yield for such a small gain. Either way, it's a gorgeous plant!