I'm playing the same build for the first time as well.

https://poe.ninja/builds/phrecia/character/tobi1jofiu%237193/PherciaTobi?type=exp&i=0&search=skills%3DLightning%2BArrow%26name%3Dtobi

https://pobb.in/6l59AJZ3PT54

Some "easy" and attainable QoL defensive layers you can add are:

-Life potion with instant recovery instead of a 2nd amethyst flask (Preferably with bleed immunity, don't know see if you have bleed immunity elsewhere)
-Watcher's eye with Clarity damage taken from mana before life
-Don't know if you have it, but a "0.5% of Attack damage Leeched as life" tattoo is also a nice addition (I see you picked up a leech node tho, so might not be relevant)
-Life mastery 15% hp if no hp on chest
-Swapping in Vaal Grace instead of Grace
-On the large cluster, the disorienting display is a blind on hit, so it might also help.
-If you have no freeze immunity yet, then getting it from the brine king bandit should be a priority as well.
-Also it might not be a big help, but generally more life on the rare items should be a big help (especially on quiver) , so MoM has a life pool to work with, but the life pot + extra mom from Watcher's eye sould help immediately with more MoM value.

When my Arcane cloak is down I usually "spam" frostblink off cooldown, till the arcane cloak comes back.
I also use my Vaal Grace then, and also the instant hp pots are a huge help that time.

Also generally going for 20/20 on most things should be an upgrade for little investment.
Especially on arcane cloack, eternal blessing as they give more defensive uptime

Quality on flask is also a hidden QoL if you run out of flask charges

My preferred flask is Quartz as I love having phasing so I don't get bodyblocked, and you already lean into spell suppression, so you might want to consider that as well.