Any good skills to invest points into?
It's been a while since I've played the game but takedowns are handy as they can dramatically increase the amount of XP gained from kills (though having said that it's hardly a finite resource -- I'd maxed out all the useful skills before reaching the second island), while anything relating to money can be saved until the very end as you're never in short supply. Some of the spider-related skills can be helpful for stealth approaches, and the same is true of the steady aim skill for when you have a silenced sniper. Syringe, armour and health-related skills aren't overly important but if you have points to waste aren't a bad investment.
I'd prefer Steam gifts but I could stock up a little on keys if need be.
Edit: Oh, the bundle is over. Maybe I'll flip a coin tomorrow.