Re: help in my fanatic zealot
So what items must i wear to deal with physical immunes and Iron Maiden?
Get a point in Sanctuary for undead. A lot of physical immunes are undead and this will make you quicker at killing them than things like Vengeance. The Lawbringer that DM mentioned gives you this aura for free, so it's a good backup weapon (if you can get a Lem & Ko).
For Iron Maiden, your only real solution for this build is to not (melee) attack while under this curse. At all. Physical-Melee attacks on /players8 simply isn't a viable idea when under the Iron Maiden curse.
Either run away until the curse runs out (switch to Cleansing to reduce the duration) or go to town to get it removed, or switch to Vigor and run around without attacking to get re-cursed with something else (expect to drink some potions - and get
close to Oblivion Knights when doing this, don't run away, and hopefully they'll overwrite IM with Decrep). Or get a socketed bow and stick some Ort runes in it and use it on weapon switch, or something like that.
Even if you get a perfect elemental-based melee weapon it won't work very well on /players8. I tried it once with a 2-8 physical damage and ~1000 (total) elemental damage scimitar and even with Conviction to help my damage I still received ~300 returned damage per kill on /players1. With higher monster life on /p8, zealing under IM is simply not a viable solution.
Do i need to put vengeance for PI's?
It doesn't hurt, but Sanctuary's better for the undead ones - which should be ~70+% of the PI's you fight. You can easily spare that extra skillpoint for Vengeance to tackle the other ~30% though.
Mercenary, Might or Holy Freeze?
Or Blessed Aim, since your AR will probably be pretty low. Assuming you get to hell with ~5000 AR (probably a reasonable estimate), I'd be likely to choose the BA merc. A rogue (casting Inner Sight) could work too.
Which skill must i max first? Zeal, Sacrifice or Fanaticism?
~10 each in Zeal/Sac, picking away at one-pointers until 30. Then max Fanat. once you get to level 30.
That's how I'd build it.
For the weapon, basically anything reasonably hard-hitting and able to hit a decent zeal speed (and hopefully having decent leech and/or crushing blow). For untwinked it pretty much depends on what comes up.
Some of the clubs (Nord's Tenderizer, Demon Limb, etc.) are adequate, relatively common, but often overlooked. I'd also keep a 'Black' runeword in mind as a moderately solid untwinked solution (at worst it'll be useful for boss fights), and on /players8 you're likely to stumble across the necessary runes at some point.