BiS Gear
The Best in Slot (BiS) Legendary, Weapon and Relics for Xavian are shown below.
Legendaries
On Xavian you have 3 Legendaries that are all powerful in their own right, and depending on your build, each Legendary has substantially different value.
What I'd consider Xavian's best all around Legendary is:
Runed Amulet Of The Horizon: Enemies hit by your Solar Blades deal 20% reduced damage to you for 5 seconds. It also makes Solar Blades have a 30% chance to be a guaranteed crit. With the cooldown of Solar Blades already being fairly low and only getting lower with Haste, along with the frequent resets, the damage reduction from this has quite a high uptime. This is easily our best general Legendary that has very powerful use regardless of talent set-ups.
Sandworn Sabatons Of The Fortress: This Legendary makes it so that Your Solar Shield now reduces damage taken by 40%, and additionally when you take damage that would otherwise kill you, Solar Shield is applied for free with a cooldown of 5 minutes. This Legendary increases your durability a lot. With a stronger Solar Shield, in combination with talents like Invictus and Solar Vanguard, you’re not only tankier, but you deal a substantial amount more damage as well. It also allows you to effectively make any ally with this shield take massively reduced damage.
Guilded Cloak Of The Sunlit Kingdom: Each time your Brilliant Flash consumes a Swift Reprival, you gain 1 stack of Grossly Incandescent. When you reach 4 stacks, you’re given 1 stack of Omega Reprival. This Legendary is largely there to enable your off-healing, however, due to its lacklustre nature and more so the potency of the other options, this is easily the worst of the bunch. It is fun if you want to try out no healer dungeon runs!
Weapons
Weapons for Xavian are fairly flexible as it stands. Different Weapons utilize different Master Weapon traits better, so things can be fairly free flowing. Below I’ll list in order what I believe to be the best Xavian weapons right now:
Fateful Arms - A 70 second cooldown cleaving strike that’s on the global cooldown. It was nerfed from its previous iteration, and no longer grants any Expertise buff, as well as its damage is virtually non-existent now. However, its 200% CDR for 6 seconds is still extremely powerful.
Xavian doesn’t actually benefit as much as other Hero’s from this effect since his cooldowns are all quite short, but regardless it allows you to press more of what you have, effectively generating more Brilliant Flashes and more Solar Shield uptime. It also interacts with the most powerful Master Weapon Traits very nicely, as well as certain talents.
Sahril's Arms - A 90 second cooldown absorb shield that explodes upon expiration to deal a large amount of damage. This is a great weapon for Xavian since it adds an additional defensive to our arsenal. It’s not as powerful as it could be since they adjusted how shield stacking works in the new season, so you can’t overlap this with Solar Shield for immortality, but it's strong nonetheless.
Darkfrost Talon - A 30 second cooldown, single target icicle attack that stuns the target enemy for 3 seconds and deals a small amount of damage. When the effect expires, the target explodes to deal frost damage to all enemies around them and reduces movement speed by 65%, and more importantly, attack speed by 40%. Affected enemies all take DoT damage throughout the debuff duration.
This weapon effectively provides 40% damage reduction from the most prominent source of damage in the game as a tank: Melee attacks. It’s very powerful and with specific gem and weapon talent set-ups you can heave this at a very high uptime, which allows you to get back 2 talent points from Opposing Presence since attack speed slows don't stack. This is weapon is what I'd consider to be the best option for end-game.
Gear Sets
Set bonuses have the capacity to be extremely powerful. Different dungeons drop different sets allowing you to farm your best in slot bonuses. These bonuses can bolster your power quite a lot and below I’ve gone ahead and listed some important set bonuses that you can use as Xavian.
Torment Of Bael'aurum: This gives a good flat amount of main stat with no rng to it. Nice and consistent, with a solid cheat death effect.
Dark Prophecy: Your abilities have a chance to increase your haste by 25% for 20 seconds. This is easily your best set for Xavian with how important Haste is.
Drakheim's Absolution: This is a nice and simple 20% increase to main stat during your ultimate. As Xavian naturally has a lower cooldown ultimate than other Heroes, he also gains more value from this set. It is great for damage when playing blue gems but not great defensively since you are already strong inside your ult.
Sin Warding: 3% Expertise and 5% max hp increase. Nice and simple. A static stat increase that increases our EHP. Expertise also buffs our Solar Shield so it has quite nice interactions and does more for our damage with specific talents than just the 3% suggests.
Tuzari Grace: 3% Haste and 20% movement speed. Haste, Haste and more Haste is always good, and surprisingly the 20% movement speed is significant.
Relics
Relics are utility items that fill up 2 of your gear slots. They all have unique utility effects tied to them that enable you to do different things. From Shrouds and Portals that enable skips, to Damage reductions and Health potions. There are a lot of different Relics and each one serves a person to any given group, in any given dungeon. In the latest patch Tanks have had Sinbinding Stone removed from their loot tables and had it replaced with a new personal damage reduction relic: Obsidian Sigil. It’s a 60 second cooldown, 30% damage reduction for 6 seconds. It's an entirely extra defensive and with the limited number we have at our disposal to stop incoming damage, this is extremely powerful and should definitely be acquired as soon as possible.
The other options we have at our disposal are listed below.
Saltwash Elixir - Instantly heals you for 40% of your max hp on a 2 minute cooldown.
Grimoire Of Resurrection - A simple combat rez. It has a small cast time with a 5 minute cooldown.
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.
Orb Of Shadows - Party wide invisibility for 15 seconds on a 6 minute cooldown. There aren’t too many notable uses of this but it can be strong if you plan around skipping packs with this.
Bloodrite Drums - A 12 second, 50% movespeed increase for you and your allies.
Humming Portalstone - Opens an interactable portal. You can only have 1 of these active at any time and there is a short cooldown on how often you can take the portal. It has a 2 minute cooldown. With co-ordinated play it’s very useful.