@ScarDuck14
I'm just sharing my observations, hoping someone can work it out. That was just what I felt was happening in Hungary. But after what you said about Spa, I had to see what happened there using the same settings and AI and the default set up again, so we are all the same as far as I'm aware. And I do know about the wear being x2 on 25%.
Starting in Hungary, I've done it at 75 as that's around where I qualify around my TM on a few tracks (including Hungary as show in qualifying pic), but it's 15 lower than last year when I was up to 90 but full TC this year and not medium, might have something to do with that, but never had it at 100, don't think I'd be competitive. I got my 5-second penalty when Norris had a lunge from nowhere, but there were a few times I had to position my car in the right place to make them back off a little and keep some behind. But a lot of hard work, as those in front just pulled away (race result pics)
I'll post the remaining times in the next post and then go to Spa.