Adding pressure, esp if you're already starting at factory specs, is generally not the direction to go.
Tire wear is a combination of camber, tire pressure, track conditions, and temperature. Camber and track are probably the biggest factors in wear. Some tracks are harder on tires than other tracks. With factory LCAs, the pics of your tires are probably typical. Your next step would be GT3 LCAs. But regardless of what steps you take, tire wear is a fact of life when doing DEs. Looks like you have another 1-3 days left on those, which is typical of street tires (10-12 days).
I have an 08 Cayman S Sport. Factory specs on pressure are 32 frt, 37 rear. I have my camber set to -2.3 frt, -2.0 rear. I just went to -2.3 frt from -2.5 as I wanted less inside wear. I had Conti Extremes for several yrs but just bought a set of Yokos that I used for the 1st time at Indy in Aug. Here's what I've learned about street tire pressures that works for me:
I start in the morning setting my cold tires at 3 lbs under factor specs (29, 34). After the session, I set the hot pressures to 3 lbs over factory specs (35, 40). I keep them at the 3 over throughout the rest of the day. Pressures go up throughout the day as ambient and track temp goes up and I release pressure accordingly after each session. By the end of the day and the tires cooled off, they could be down by as much as 7 lbs. Your TPMS is not going to be your friend, esp if there's a long time between sessions. At Indy, it's 2 hrs between sessions. I started the last session with semi-cooled off tires with my TPMS telling me I had a flat tire because of the 7 lbs under spec.
How do you know what's the right pressure? Your tires tell you during a session. If your car starts off handling well, but somewhere along the line it starts to push and the tires are howling, you have too much air. Drop the pressure after the session. If your car is pushing half way thru the session, drop 2 lbs. If it's 3/4 of the way thru before handling goes away, drop 1 lb. Find the pressures that keep your car handling well thru the whole session and then use those #s as your baseline the rest of the day.
My 1st run of the day is generally a throw-away session. My tires are cold and the track is too. Probably not going to set any lap records. Good time to hone in on what your car is telling you. As I said earlier, I start the 1st session 3 lbs under. It usually goes half way thru the session before the handling turns to push. After the session, the pressures are usually 37 & 42. I drop 2 lbs and I'm ready to attack the 2nd session - I have my tires at the proper pressures and the track is at optimal temp. As the day and track warms up, I chase it with dropping pressures (usually 1 lb at a time) the rest of the day.
But rounding back to your original ques, tire pressure will have less to do with outside tire wear than camber. If you want to address the wear, GT3 LCAs are your next step. Tire pressure affects handling more than anything.