QUOTE(formigao @ Jan 23 2016, 06:56)

what is be the best gear combination for 1h ?
Weapon:Ethereal Rapier of Slaughter
Shield: ? Force Shield of ?
Helmet: ???
Body: ???
Hands: ???
Legs: ???
Feet: ???
should every piece be power ? or some plate for more def ?
all of of Slaughter ? of Balance ? of Protection or of Warding ?
do you guys already have the magic combination for best results ?
If you're going to IW to 10, unless it's high-tier Legendary, I might prefer Demonic or Hallowed over Ethereal, because Holy/Dark adds a decent amount of damage but you only have a 1/3 chance of getting on Ethereal (and that's
after having possibly worked hard to get Fatality and Butcher).
For high-level players 350+, full (Mag+) Power Slaughter is the best because they'll never have to Cure anyway. Defense doesn't matter, so Plate is useless in comparison to the ADB provided by Power Slaughter.
From 250-350 or so, incoming damage will still be high enough to pose a problem, so ideally you'd want some combination of (Mag+) Power Slaughter > (Mag+) Power Protection > (Leg?) Plate Protection. As you level up more and gain more innate toughness from level scaling, you can drop your defensive gears and replace them with Power Slaughter (hopefully), so by the time you get to 330 or 350 or so you have full Power Slaughter.
Of course, Power Slaughter is quite rare and expensive, so to do that successfully you need a lot of funds, or a lot of soul fragments.
Protection is the best shield suffix. Force Shields have very high block, but they're also very very expensive to forge. Unless a player were a rich level 400+ player, they'll likely be better off with forging a Kite or Buckler or Barrier to 25 rather than a Force to 10.