http://www.purediablo.com/forums/showthread.php?t=129705
That's Freya's FA guide, somewhat outdated on some departments, but there's some good info there so It's a good read. Definately rely on mana leech to keep your FA up, bcause I think in HC it's not a brilliant idea to fill three slots of your belt with blue pots :laugh:
There's also the reason why Faith makes excellent bow for this build. High damage (more leech), integrated IAS and AR. All these are needed for both FA and Strafe.
The skills are kinda hard to say for other ppl, since you can't know how much + skills they get and so on, but here is a template that should work. Also yes, don't put much points into pierce if you're going to wear Razortail. Otherwise do, since it's very important for FA. Aim for above 75% Pierce.
The skills yes. Max Frozen Arrow and Cold Arrow (must).
General advice is to get Valk to lvl 17 with skills. This nets her a rare war pike. You can go higher too, but lvl 17 Valk is a pretty mean lady on her own by then
D 2 / A 1 / E 2, since having torch and anny alone without any other + skills takes them above 40. This is your preferance. If you want you can boost them higher to get more, or you can even leave them at lvl 1, which is totally viable if you have good stuff. As long as they reach the 40 mark with items you'll be fine.
Pierce I'd leave at one point with razortail, since having torch or torch / anny takes the pierce way above 75% without any other +skills if you're using razortail.
One extra note: While Tgods might be better for HC than Razortail, this build is somewhat tight on skill points as it is, so if you use some other belt than Razortail, prepare to sink more points into pierce because you'll need it. These lost skill points
will affect your build in other areas tho, like damage or AR.
The hardest part comes with Strafe and Penetrate. You could go 10 / 10 in both but it's really up to you. If you need more AR, go for penetrate, or if you feel you're strafe is lacking damage wise, put more into it (altho it will gain only 5% ed per point).
1 point into all prequisites. Even critical strike, as it will almost go to the 50 mark with torch and anny alone. If you've got leftover points, invest them into where you find something lacking. If you're valk dies too fast, more valk, if your AR is low, penetrate, or if you wanna rip everything out of strafe max it then.
NOTE: you prolly know this but strafe is a *next-delay* skill, so if you don't have enough monsters around some arrows will not do any damage whatsoever and it might seem they're not hitting the target. Best practise is to check your AR and chance to hit on the character screen and judge whether or not you really need more AR. This is probably better explained in the Zon forum stickies there's a topic on this matter.
All these skill placements depend on eatchother really, you just have to know what you're going to wear and what you need if you really want to optimize this build. Good luck :laugh: