If, like me, you aren't an alien, the obvious choice is the Mazda LM 55, medium RPM turbo, every tyre choice purchased and go for it.
Try, and try, and try. You will get used to the car and the weather will come to play on your way on one of this tries.
There aren't set in stone strategies, my first two tries the rain wasn't enough even for inters, so...
Other the right moment to put wets was lap 4, when everyone else pits, no one messed up with wrong tires, so no advantage on saving fuel to stop latter.
Just get used to the car, the speed the weather develops from radar, to track and to the amount of water in the track, after a handful of tries you will have it figured out and you will out strategy them. On raw pace is almost impossible, the AI is rigged at Suzuka. There was once where I put a AI car on the grass at the hairpin, completely wet track and it still was faster accelerating from the grass than me from the track, TCS 2.