Re: PvM Strafer with Faith. Which helm: Giant Skull or Andy's?
Yes, that's my zon equipment, except that I will wear frw boots with resists instead of WT (although I'm aware of their +dmg bonus).
With Faith you don't need more than the one point in penetrate for being a prereq. That bow has ITD (i.e. you hit every regular monster from about L85 on at the maximum chance of 95%) and those boss monsters which are hard to hit are killed with GA which hits all the time. Even if that's not your way of doing it, Faith has a 300%AR bonus and with good dex, you will hit well enough.
IMO 1 point in MS is enough, I just need it versus missile shooters which come in hordes, like the blowgun flayers in the WSK, to avoid being strafelocked. Apart from that, I don't use MS because it needs too many arrows and I hate running out of them. A +2 Faith adds +5 to bow skills and a torch +3, that's 10 MS arrows (or even 12 if you wear Andy's).
For me, magic arrow only has to use less mana than my zon regenerates, apart from that it's just for triggering amp on PIs which don't come in crowds (and then switch to strafe). One point or maybe 5 are enough. BTW, the AR bonus of magic arrow is bugged, it doesn't work at all IIRC.
I usually invest a bit in GA, to have an easier time with enemies like that choleric guy called Diablo who's waiting at the end of each visit to bowazon Disneyland. It's better than magic arrow because it hits all the time. Similar to magic arrow, its mana costs decrease with further investments.
BTW, this isn't my first bowazon, but something like my 10th, but I'm willing to give up a few old habits and learn new things
. The main difference is that I'm not going to use Andy's which I did so far (since the first ladder season), but a Giant Skull and I didnt know speed breakpoints that well anymore. 20% IAS from LoH is enough, further %ed from jewels won't add enough in comparison to 300% from Fortitude, 250% from Might (merc), 400% from dex etc. That leaves Cham, Shael and-req/xx jewels.