BiS Gear
The Best in Slot (BiS) Legendary, Weapon and Relics for Helena are shown below.
The Masochistic Razor Necklace is generally considered the best Legendary for Helena, especially on tough bosses. However some top Helenas prefer Warboots Of The Blackened Vanguard - it is generally more effective on large trash pulls since Shockwave is uncapped.
Legendaries
On Helena you have 3 Legendaries - the neck, boots, and cape.
The Masochistic Razor Necklace is generally considered the best legendary by most top Helena players due to the damage and damage reduction it gives from Shield Throw - it is particularly effective against difficult bosses.
The Warboots Of The Blackened Vanguard are also viable, granting a Shockwave for every Charge you do, and some physical DR from Shockwave. This in turn gives you a lot more uses of Shields Up - very good against large trash pulls.
The Unscarred Vigilante's Cape grants you some DR and damage while empowered Shield Slam's shield holds. Unfortunately in high eternal that shield doesn't tend to last very long so this legendary isn't as great.
Weapons
In general there aren't a whole lot of options for weapons right now as Helena, but there are a couple clear outliers in regards to strength that are worth talking about.
Fateful Arms - A 60 second cooldown cleaving strike that’s on the global cooldown. It provides a 20% buff to your expertise stat as well as granting 200% increased CDR for the 6 second buff duration. If used at range it will also charge you to your target. This weapon isn’t as strong offensively as Sahril's Arms, however defensively it can be very strong, giving you significant CDR to everything on a short cooldown. Most notably this includes Shields Up and Grand Melee. This weapon has very high potential.
Sahril's Arms - on a 90 second cooldown this has the on-use effect of self-applying an absorb for essentially your entire health bar. When the absorb is depleted or expires, it explodes to deal massive fire damage.
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. Ideally you’ll only want 2 of your gear pieces to be a set bonus and the rest socket pieces (because of how gem power works). This allows us to fully maximize our gem power whilst also enabling ourselves with a powerful set bonus. Below I've listed the most important set bonus you'll want to acquire for Helena as well as an alternative.
Dark Prophecy: This set gives your abilities the potential to increase your haste by 25% for 20 seconds. It procs roughly once per minute and is huge for Helena. More haste allows you to use more globals for more CDR on top of the GCD and Shields Up CD being hasted.
Tuzari Grace: Helena lacks mobility so the 20% movespeed can help make up for that. 3% haste is a nice bonus as well.
Relics
Relics are entirely utility focused in Fellowship and they mostly aren’t unique to specific heroes so it allows for a lot of change. While you can use any relic, there are a couple that are especially notable and arguably the best of the bunch in a general sense.
S-Tier Relics
Saltwash Elixir - Instantly heals you for 40% of your max hp on a 2 minute cooldown. This Relic is already insane for Tanks and that’s before considering Helena specifically has no self-healing. A must-have for sure.
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 in the game.
A-Tier Relics
Grimoire Of Resurrection - A simple combat rez. It has a small cast time with a 5 minute cooldown. Great if your party lacks the ability to rez.
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, but it is over-shadowed by the S tier relics.
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 much better relics on offer.
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.
B-Tier Relics
Bloodrite Drums - A 12 second, 50% movespeed increase for you and your allies. It’s not great. It can be helpful to kite since you lack mobility on Helena but it’s one of the more lack luster options
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 could be useful but for most it’s not a great option.