1. Get it to 75.
https://wiki.project1999.com/Statist...lity_.28AGI.29
2. Not really.
https://wiki.project1999.com/Statistics
3. No, not from the character creation screen anyway.
4. I would go for Int if I planned on doing much soloing. Here is how much hp you lose at 60 by not taking the stamina option. It's not much.
https://wiki.project1999.com/Game_Me...nt_Calculation
5. No idea.