On a personal note on this, I
finally figured out how to do lateral dumbbell raises without pissing off my right AC joint. Roll the shoulder forward a bit more, palms facing back at the bottom of the rep, straight down at the top, and keep a bit mroe of an angle in my elbows and BANG! No more pain in the front, just that lovely tingly burny feel right down the center of the muscle. You have no idea how happy that makes me - even if it did happen the last week of my last TSPA cycle. Whatever, it just means I know what I'm doing from the first week on the next cycle!
Which leads me to my knee-jerk reaction on that Scott press... that looks kind of joint un-friendly. If you don't have a history of shoulder problems, then this is likely a non-issue (and I hate you). If you do, go stupid light on the weight until you get the form down and you know the motion itself won't irritate your joints. Personally, having had my right shoulder flat-out collapse during simple overhead presses on me in the past, you'd have to put a gun to my head to get me to try this. If you do not have my busted old man issues and are feeling adventurous, it doesn't look "bad" in and of itself.
As to the motion itself... I'm not sure it's as effective at isolating the lateral head of your deltoid as the T-Nation trainer would have you believe. The primary action of the lateral head of the deltoid is moving the arm laterally away from the body. It's
involved with other movements, like flexion (think front raise) and transverse abduction (think reverse flys), but it is not
primary with those movements. That Scott press strongly resembles transverse abduction but done seated instead of lying on your stomach. It will, absolutely, hit your lateral head, no bones about it. It will also - especially for the first like 2/3 of the rep where you're moving the weight out from the centerline of your body to the sides - engage the posterior deltoid moreso than the lateral. It doesn't strike me as the hugest of huge deals, but it is what it is. The amount of motion does give you more chances to injure yourself, too. The more complex the motion, the more chances to screw it up. If you're bored to your wits' end with regular lateral raises I could see subbing these in for a while just to prevent losing your mind - but the mechanics are such that I'd bet they'll be marginally less effective.
Also - following them with cable uprights doesn't give quite the same superset as you're probably thinking it does. Military/barbell overheads hit primarily your anterior deltoids while also engaging the other two heads (particularly at the bottom of the rep). Standing upright rows are more your lateral delts. You're basically supersetting a lateral exercise with a lateral exercise. A better choice would be whatever iteration on an overhead press you please, or front raises.
Your incline dumbbell lateral raises are basically the same damn thing as a regular lateral raise. I would tell you to use an even number of sets that start with them for one reason - you can only do one side at a time, so like it or not, one shoulder or the other is getting a rest between sets. Even number of sets means each shoulder gets the same amount of rest - and the same number of bona fide supersets.
Shrugs are shrugs are shrugs. Barbell, dumbbell, cable, machine - doesn't bloody matter. My gym has a plate-loaded machine specifically for them that I really like, though ultimately it's put weight in hand and make shoulder touch ear, and that's that.