Stamina is most important stat in the game, it's like a life bar.
After that, I'd say repair for 2nd place and 3rd place would be composure.
#1 Stamina ( Life bar, once its out, you're basically dead unless you have a pocket knife)
#2 Repair (A stat to repair vehicles and the phone faster. Obviously important especially for a good Jason. Only high repair counselors can repair when Jason is in the vicinity.)
#3 Composure (Having less fear keeps your stamina regenerating normally, allowing you to use your minimap and inventory, and breaking free from Jason's grasp. Also helps prerage when you're outside of Jason's normal sense detection range. Also helps stumble less when not scared)
#4 Luck (Useful for bodyguarding people and battling Jason, although has little significance after rage outside of starting the car faster and tripping less if you have high composure.)
#5 Speed (A bonus to have with stamina but not that important in the grand scheme since Jason can outshift anyone running. Although high speed counselors dont have to sprint to keep ahead of running Jasons, so they preserve stamina)
#6 Stealth (Useful to a degree if you know how to use it properly to push objectives or wishing to stay away from Jason prerage. Although after rage, stealth has absolutely no significance in the game since everyone's stealth is significantly boosted. I think Vanessa's stealth is a 8 in rage mode. Jason also relies on his sense in rage, his range is significantly boosted)
#7 Strength (not useful in normal gameplay unless your intent is killing Jason, I'd say the weakest stat, although it helps a bit with breaking from Jason's grasp, composure is better for that but both combined is ideal. )