WOI has 5 types of gear, each with it's own special atributes,
Golden Gear - Obtainable in instances, this is the only gear set to include a damage bonus/reduction to specific monster types making it invaluable for PvE.
Soul Gear - Dropped from the PvP area's mobs and bosses,
SG focuses on elemental damage making it the PvP set.
Holy - Obtainable from oracle wars these include a Set bonus the more parts you are able to equip, only the 4 accessory slots have holy gear available at this time.
Legendary - Obtainable from bosses and the chaos arrived event, very similar to soul gear, legendary parts have 1 additional blue stat often with a random chance to activate.
Deity gear - Obtainable in Chaos arrived and certain instances, this is the rarest of equipment, Deity parts bring a set bonus for every 2 parts equipped.
My Chosen Set up:
Currently only 4 parts of Soul/Legend gear can have the rare blue stat - Lucky Strike +2%.
Weapon/Paudrons/Chest/Greaves,
So when available I equip those, the usually carry the premium price tag but I feel its worth the cost.
For helm/Gloves/Belt/Boots
I have gone with 2 sets of Golden Gear to swap out depending on the situation,
Demon for most Bosses/Instance and Undead for Clan events and Aura farming.
Because of how detailed each of the gear improvement stages are I'll break them down individually.