This is according to Farsight, the Sampire master. Here is what he calls for as minimum on suit:
"Stats:
100 strength
Enough int to cast all of your weapons specials (if you're an elf, you can get away with 10 int, for a human, you need at least 30)
As much dex as you can get away with up to 125
Items:
The sampire depends on the right items to get away with this template, which can be very pricey or very cheap.
The bare minimum you'll need for a sampire is:
Armor:
45% DCI (70 if you depend on divine fury)
All 70's resists
Weapon:
A weapon that swings at the highest possible speed (1.25 seconds)
High mana leech
High stamina leech
Combined armor, talisman and weapon
100% damage increase"
Then even more basically, he says:
"45% DCI, all 65 or more resists and you have a sampire-ready suit for ALL aspects of the game.
All of this imbuing, stamina, lower mana costs, hit chance increase, damage increase, etc is just gravy."
So the key is resist and dci as minimum. Use fey leggings on your suit, have dci on ring/brace, quiver of infin, etc.