He does come down twice, but I’ve never been able to properly route for his first appearance (which is around 40 seconds depending on cutscene I think). Maybe some kind of shenanigans with a sniper rifle. Might also be interesting if he could be called down with a distraction or lure, maybe even the phone, but I don’t think he hears audio lures at the bottom of the tower even when he’s down at the breach.
Yeah, and there’s often a lot of waiting, and I think most people are interested primarily in the speedrun. Easier to just speed up the restriction run.