How to make my build more survivable

So I'm playing Shadestepper with this build:
Nephilim
Soarfae
Second Wind (The main problem)
Accelerator
Breezehands
Dispersion
Double Vision (Non-negotiable)
Recalcitrance
Flameshot Hilt

I find this build to be a lot of fun, due to the insanely high damage output... if I survive.
The main problem I have is the lack of LS and Regen is seriously killing me, every time I attack. This makes it suboptimal for raids and such. Thus I come to you guys seeking a solution. What alternatives are there to second wind? Those are the leggings I use, which while giving me super fast attack speed, also cripple my survivability. Thank you all in advance.
Ps) I would like to maintain the super fast attack speed if at all possible.

 

If I'm going to be honest with you, I feel like this build needs to be reworked from the ground up.

Shadestepper is also a very mana hungry archetype, so unless you're using nirvana or weathered, it's best to go for mana-steal for sustain, but for this, you want at least ~60/3 mana steal and a super slow attack speed. This is because the slower your attack speed, the more mana you'll get per hit.

https://forums.wynncraft.com/threads/the-ultimate-build-guide.320092/

This is Sugovon's build guide, it has a Flameshot Hilt build I will link here- https://wynnbuilder.github.io/builder
It is much slower, and about 1/3 as tanky, but has much more damage and won't get you killed with negative life-steal. If you want, I can also try to homebrew a Flameshot Hilt build for you, in case you need something tankier and faster.

For future reference, questions about class builds should go in the "Class Suilds" subforum.

 

Gotcha, sorry for putting this in the wrong spot.
Though I wouldn't mind you homebrewing a better build. Honestly I think what I have could work, if I hadn't somehow lost my Humbark Moccasins. Since that would seriously mitigate the negative lifesteal. However, I am still open to suggestions, particularly for any builds which could be both fast and sustainable.

 

you can farm the hive level bosses for the respective level's rewards btw

 

I did not, thank you for informing me.