(3.26 ✔) Soulrend Aurastacker / Block based Chaos DoT / Infinite EHP / All Content ✔ /

The big issue here for damage is the missing gem levels and your allocated points are very scattered. With a couple of hanging points.

See if you can buy a +1 all chaos amulet I noticed that soulrend amulets went from costing 1 divine to costing 9 divines in the span of 1 league.
Search for these amulets instead
https://www.pathofexile.com/trade/search/Mercenaries/JvW0brRIl

See if you can try to buy a level 21 soulrend. That would be +2 levels from where you are now and will spike your damage.

Each gem level is a major break point in damage. If your dot can insta kill things then the explode just makes your life easier.

For clusters you don't want to take every node on them. You want to minimalize what you take and what you get from them with the end goal being whats at the end of your jewel sockets. In your case you have 2 jewels with one of them not being used (I have a habit of doing this ngl lol) The other jewel is 6% chaos dot multie and mana reservation which you dont actually need right now.

That being said if you do invest points into a cluster jewel you need to make sure you are at least trying to get something by the end of your cluster. Not just jewels that have 1-2 stats that you want on them. The reason this is, is because clusters are direct competition of the skill tree. If you dont have a cluster to use.

I would recommend before having clusters to take hasty demise. It lowers soulrends duration though but for 4 points youd get a lot of damage.

If you have a 2 notable** cluster make sure the notables are decent (Touch of cruelty alone itself is not good) only take the right path of the cluster up until you get the top node. After that youll want a medium cluster jewel. Heres a search for this leagues clusters:
https://www.pathofexile.com/trade/search/Mercenaries/8jzGBBGFV


The most important thing is

Get a vaal discipline.

Its like a health potion that doesn't stop and keeps going while you are in middle of combat. So if something nails you for 90% of your barrier then you can instantly go to 100% and be safe for the next couple of seconds.

Thanks for the massive help.

Ended up getting a level 21 Soulrend gem for the massive price of 8C.

Switched up the cluster setup and bought a +1 chaos amulet while saving for the dragonfang.

Also got a vaal discipline which i am currently leveling up. Already feeling a massive difference and got a solid plan for further improvements. Thanks ALOT

Anytime! Also willing to do this for any future player!