BiS Gear
The Best in Slot (BiS) Legendary, Weapon and Relics for Gunde are shown below.
For Legendaries, Carver's Sinister Apron is better for Grim Carve focused builds, and Band Of The Bleeding Heart for Heart Splitter builds.
Fateful Arms is the best weapon for all Gunde builds, as it has great synergy with his base kit.
Relics are taken based on which effect is needed on a per dungeon basis. Coordinate with your team or take the ones you prefer.
Weapons
Fateful Arms is the best weapon for all Gunde builds, as it has great synergy with his base kit. However early on in progression the difference is not big, so don't be too discouraged if you loot a different one first.
Gear Sets
Set bonuses have the capacity to be very powerful. Different dungeons drop different sets allowing us to target farm our best in slot bonuses. Sets now slot into items as one of the up to 3 Modifiers on the item, which means that sets are more powerful and therefore desirable than before. I've outlined the most powerful sets for Gunde's different builds below.
Seal Of The Heskyr: This set provides a 25% increase to Gem Power, which let's us hit more and better Gem Power breakpoints.
Death's Grasp: This set gives us a 10% damage multiplier against enemies below 30% health along with a flat 4% increase to Spirit. Very good overall and especially against bosses and enemies that become more dangerous when they're low on health.
Draconic Might: This set gives us a chance on critical hits to get a buff for an 18% increase to Strength for 14 seconds, it has a ppm of 0.9 that scales with crit chance, meaning with more sheet crit we have the more procs we will get per minute.
Drakheim's Absolution: This set gives a 20% increase to Strength for 20 sec when activating Bloodbound Spirit allowing us to deal substantially more damage with it and other abilities during those 20 seconds.
Dark Prophecy: This set gives our abilities a chance to give us 25% Haste for 20 sec on a 0.8ppm basis.
Relics
The relics in Fellowship are almost entirely utility focused and they are therefore very situational, although there are some that are generally more useful than others.
Universally Useful Relics:
Sinbinding Stone - Grants 15% damage reduction to yourself and nearby allies for 15 seconds on a 3 minute cooldown. This Relic is extremely powerful, particularly on some of the harder bosses and pulls in the game.
Generally Useful Relics:
Grimoire Of Resurrection - A simple combat ress. It has a small cast time with a 5 minute cooldown. Great if your party lacks the ability to ress.
Ancient Wardstone - Instantly dispel all harmful magic effects from yourself and allies on a 2 minute cooldown. This can be extremely good in some dungeons depending on how you’re pulling.
Ancient Poultry Fetish - Turns your target into a chicken. Permanently. This cannot be used on Bosses but there are pulls in dungeons where utilizing this Relic makes life so much easier. It has shared uses by the party on a 3 minute cooldown, so its value lessens with multiple users in the same party, alongside the fact there are generally better relics on offer.
Orb Of Shadows - Party wide invisibility for 15 seconds on a 6 minute cooldown. Very good relic that let's your party skip large portions of a dungeon, carries a bit of risk until you light a campfire, as it has a large cooldown.
Humming Portalstone - Opens an interactable portal. You can only have 1 of these active at any time and there is a 20 second cooldown on how often you can take the portal. It has a 2 minute cooldown. This relic let's you skip difficult packs in different dungeons and let's you route more aggressively, which is very useful situationally.
Saltwash Elixir - Restores 40% of maximum health on a 2 minute cooldown. Good if nothing else seems appealing, or you don't trust your healer.