I'm very glad PD did this set of seasonals and wish they'd do more like it. Very much an exercise/lesson in how to manage grip, both of them.
I've been away from GT for a couple of weeks and just did this last night before the deadline. Managed a showing in the F10 race in the 3400s. Brake balance 3/7, TCS 2 and active steering to mild. Decided MT was the only way to go (I normally run AT in the formula cars, the changes on a dry track come too quickly for me) and short-shifted like mad. Any hint of wheelspin, up a gear, was the rule.