Gearing as Assassination is relatively easy. There aren’t many “required” pieces of gear, and most generic slots with no special effects can be filled by any high-item level piece you can get your hands on, as Assassinations stats are relatively close. Even PvP gear is good, as long as you don’t stack Versatility very much.
Some Special Items to watch out for are:
Neltharion’s Call to Suffering - Raid - The special class trinkets of this patch. While not super powerful, it is a contender for BiS depending on the situation, competing with the other trinkets listed below.
Dragonfire Bomb Dispenser - Raid - Another solid trinket, also has split damage for AoE
Beacon to the Beyond - Raid - Powerful on use trinket. The cooldown is awkward but the damage is huge.Irideus Fragment - Halls of Infusion - Powerful on use trinket that pairs nicely with our cooldowns.
Voice of the Silent Star - Raid - Cloak with a special effect. Everyone will want one of these
Fang of the Sundered Flame - Raid - High item level dagger. Only BiS in the Main-hand for the item level. Your offhand ideally is a crafted Primal Molten Shortblade with Crit/Mast or Crit/HasteOnyx Imposter’s Birthright - Raid - High item level ring that you’ll want. This is our eventual BiS. If you have a Seal of Diurna’s Chosen from mythic or even heroic item level, you will want to use that for a long while into the patch. Make sure you keep simming yourself to see when you can drop the Seal.
Onyx Annulet - Forbidden Reach - Our BiS in Single Target, and near BiS in dungeons as well. You will want Desirous Blood Stone and Prophetic Twilight Stone equipped at all times. Your third stone should be Freezing Ice Stone in Raids, or Storm Infused Stone in Dungeons. You can have multiple of the ring at a time, so farming a second ring to swap between situations is a simple and easy way to handle the change in stones.
You will want to of course grab your Tier Set pieces from the Raid. My recommended slots are Hands, Shoulder, Chest, and Legs. This is because of our embellishments.You should keep your head slot open just in case, as completing your set bonus is a priority over any specific item you could get in those slots.
Crafted Gear can be a great option, but is timegated and requires you to farm materials. For Embellishments, I recommend crafting the following:
Use any Remaining Sparks for low item level pieces.