Vision, G-tolerance or Health...

I prefer G-tolerance, the initial G tolerance in campaign modes is very low and criples your hability to dog fight properly. On the other hand, if you are the ground atack kind of guy, it's perfectly useless.
Flight Simulator and other chat
https://forums.simviation.com/phpBB3/
https://forums.simviation.com/phpBB3/viewtopic.php?f=6&t=20315