You're the man Cooties.
Indeed. Personally I always go for the headshots as they are the most rewarding shots. High risk sometimes perhaps, but high reward.
I prefer 18 str and higher agility as accuracy is more important than pure damage (10+ PD etc).
Yep

If you have time try 24/24 with your stf, you'd be surprise, is very very accurate. Before I retired for good a couple of month ago my dedicated archer Potato, I had 18/24 build, for the higher accuracy. But now after trying 24/24, for some reason, it seems to get better accuracy. Might be just me though that I havent play archer in while and maybe don't remember very well hehe