D3 spectral blade wizard in PoE?

You can instantly tell it's a beginner build because it's using both Static Electricity and allocating a significant number of Physical Damage-based nodes. It's a bit why I mentioned why Physical scaling would be simple yet powerful before. Similar to D3, Physical is a "damage type" on the same categorical level as the elements, Fire, Lightning, and Cold. "X% increased physical damage" purely means it augments/amplifies the Physical damage you deal - it doesn't add any physical damage to your damage base.

This is also why Cherrubim's Maleficence is a bit wasted here...

So we're back to the physical/elemental scaling dilemma again. If you pick elemental scaling, you're going to have to trash a large portion of your current tree. If you go physical scaling, tempestuous steel/fidelitas' spike and static electricty are all but useless, because their flat physical is very much lacking.

If physical-scaling: The tree's fine, if showing a few beginner mistakes here and there. Another typing restriction: You took "Two Handed Melee Weapons" nodes, which doesn't work with dual-wielding; the "Two Handed" refers to single weapons that you hold with two hands, y'know, greatswords and staves and the like; it doesn't refer to dual-wielding. So that's another decision you'd have to make; DW or 2H? Dual-wielding provides a bit of Block and some nodes for Critical Strike Chance; Two-Handed tends to go full on damage.

here's a pastebin of the most necessary changes to take that approach: https://pastebin.com/ynvvV40z

and a pastebin of how I would approach your build, more or less (was a bit too lazy to fine-tune gems to my liking. Also, it takes a "why not crit?" approach): https://pastebin.com/R0SNVcnJ

If elemental-scaling: You'd want to pursue elemental and attack speed nodes, principally. Static Electricity works on actual allocated Dex nodes in radius, not just Dex nodes existing in radius, so you'd want more of those in one form or another. Elemental scaling is tricky, because your sources of flat damage (base damage) will be necessarily scattered to different sources, except for a handful of Unique items. Actually, if you wanted to focus on Lightning, Hyaon's Fury would be a good weapon choice here, though a bit dangerous if you build Frenzy Charges. Not sure why I didn't think of that before. Otherwise, Added Lightning Damage would be non-negotiable, really.

Both scaling: Also, it is highly uncommon for builds to take a lot of Resistance nodes on the tree; POE uses old-fashioned D2-style additive resistances with capping (soft, can raise with +x% maximum resistances), which means resistance past a certain point tends to be completely wasted. It does make logical sense to grab them on Unique-heavy builds, but people tend to use Jewels for that as then you'd be able to get some Life and Damage while filling any holes in your Resistance.

I was a little afraid of this (I'd never used POB before, always did it the old-fashioned way), but it looks like POB's physical damage reduction number uses the same or similar formula as the in-game Estimated Physical Damage Reduction - which is very much estimated and, let's say, less than useful. Armour's contributed PDR% is based on the size of the enemy hit; the higher the hit, the smaller the percentage mitigated (however, absolute mitigation increases! Few people know that bit). This leadsa many forumers to say "Armour is useless against large hits." It kind of is, really. You could only expect a small to medium level of armour rating to defend against small to medium hits. You'd need a huge amount of armour to defend against huge hits.

Lastly - Path of Exile was not designed around an endgame character being fully fitted with Uniques - Uniques are designed to have less generally-useful stats than Rares, but grant some kind of can't-get-anywhere-else stats in return. This will mean the average endgame build will use 1-5 Uniques, and the rest Rares. Rares will always have higher stat-potential than Uniques, barring perhaps a couple of exceptions. In fact, the original game design vision was for a perfect endgame character to wear 0-1 Uniques, and the rest rares. You can see this in my decisions on the second pastebin I put above.

Hope this is all somewhat helpful and not too discouraging.