3.21 HCSSF Storm Brand Raider

Been trying to build a Storm Brand Raider for HCSSF because of the following synergies:

• Onslaught gives MS and damage
• Frenzy Charges double dip with More Damage and Cast Speed
• Easy acces to Spell Suppression & Elemental Ailment Avoidance
• Can path through Armour and Evasion nodes on my way to the Brand Nodes
• Can path to a lot of Mana Reservation Efficiency

https://pobb.in/2B5DyJdhIDuK

However I seem to hit a ceiling in both damage and survivability. Especially Damage.

I'm looking for a secondary skill that could boost single target, but I don't see it. Tried Lightning Spire Trap but PoB shows weak numbers and it didn't feel good in game. OoS kinda defeats the purpose of fire and movea round, as does Lightning Conduit. WoC felt like it actually dealt damage but I once again have to stand still while dealing damage.

I can get to 130k Pinnacle DPS per Brand on Level 21 with 6 Links. Looking at PoE Ninja, most players seem to hit 100k to 200k.

That is with early mapping gear, but there isn't taht much room on items for increased DPS.

I could dual wield Singularity and drop a defensive Aura for Wrath and I double my DPS but survivability takes a decent hit. I can get another 10% by going from level 85 to 95.

Anything I'm not seeing?

I get that it might not be a top Tier skill, but it'd be nice to hit harder.