STRONGEST ONE BAR SUBCLASS SOLO BUILD

• Wield Soul - Flame, Lingering Torment, Resolve

• Cephaliarch’s Flail - an AoE spammable that generates Crux, heals you if you hit any enemy and increases the damage enemies take from you by 5%. It will also trigger the Splintered Secrets passive, increasing your penetration by 1240
• Pragmatic Fatecarver - extremely powerful Crux spender that deals full damage in AoE, has massive range of 22 meters and grants you a big damage shield while you channel it. It will also trigger the Splintered Secrets passive, increasing your penetration by 1240
• Inspired Scholarship - an ability that deals lots of damage and ensures you'll have at least 1 Crux when your beam ends. It will also trigger the Splintered Secrets passive, increasing your penetration by 1240. Having it also on the backbar doesn't matter in the base setup, but it can be useful if you replace the frontbar Inspired Scholarship with another ability
• Deep Fissure - deals a lot of damage per cast, applies crucial Major and Minor Breach debuffs and provides 5% Critical Damage through the Advanced Species passive
• Bull Netch - provides a lot of Stamina sustain, a 5% damage boost, constantly purges debuffs and provides 5% Critical Damage through the Advanced Species passive
• Soul Harvest - a cheap ultimate that increases target's damage taken from you by 20%. You need it on your frontbar to trigger passives of the Assassination skill line. Having it slotted will also cause you to regain 10 Ultimate whenever you deal a final blow against an enemy. Having it also on the backbar doesn't matter in the base setup, but it can be useful if you replace the frontbar Soul Harvest with another ultimate
• Relentless Focus - an ability that will passively grant you 400 Weapon and Spell Damage if you're not using Oakensoul Ring

Bull Netch is the first skill that has to go when you need to slot something situational, unless the situational skill specifically says that it's replacing something else

• Revealing Flare - slot it for more difficult fights where you need more damage mitigation. It's a skill that passively grants Major Protection, reducing your damage taken by 10%. It will also trigger the Magicka Aid passive, which increases Magicka Recovery by 10%
• Wield Soul - a 10 second DoT that provides Major Resolve which increases your armor by 5948. Better defensive option than Revealing Flare in Single Target fights. You'll also have better Stamina sustain with this compared to Revealing Flare because it's a Magicka ability that has to be used every 10 seconds. It's mostly useless if you're already getting Major Resolve from Oakensoul Ring
• Resolving Vigor - a strong 5 second Heal over Time. Use it in fights where bosses have immunity phases during which you can't heal through Ring of the Pale Order or Reaving Blows
• Precognition - an ultimate that breaks you out of some otherwise unavoidable stuns, you'll need it to get around some mechanics which are otherwise impossible or very difficult to solo, like for example Inferno's Hold in Zaan the Scalecaller fight
• Piercing Mark - replacement for Deep Fissure when you're replacing Soul Harvest with Precognition. It's a worse source of Major Breach but you need a Nightblade ability on frontbar to trigger passives of the Assassination skill line

Priority List

I don't use a static rotation so this is just a list of priorities. Simply recast abilities when they run out and follow this list of priorities when there are multiple things to refresh

• Use Deep Fissure
• Use Inspired Scholarship
• Use Bull Netch
• If not at 3 Crux, use Cephaliarch’s Flail
• Use Soul Harvest
• If at 3 Crux, use Pragmatic Fatecarver

Pre-buff

These abilities can be pre-cast before entering combat

• Inspired Scholarship
• Deep Fissure
• Bull Netch