Aulen Greychain and Maven Invitational

Hello, new to PoE this season and wanted to throw this out here. I finally got to the 10 boss run of the Maven invitational and was clearing it just fine until I got to Aulen Greychain. The combination of Maven putting steelskin on him and his immortal call ability made it impossible for me to complete it. I respec'd out of every possible defense node I could and went as hard into as many damage nodes as I could. I even swapped a bit of gear to get increased damage, since his attacks do tickle. Now from what I understand questioning other players vaal ground slam is a very bottom level damage ability. No matter how I tried keeping away so he couldn't build endurance charges, turning off herald of purity so he couldn't get charges off them, I just couldn't down it. I feel like the damage output of vaal GS was tolerable up until that point. But at this point I pretty much bricked my character spending all the currency I had into squeezing as much damage as I could.

Here's what I was spec'd as for PoB:
https://pastebin.com/Qc1nW4b1

Been enjoying the game but it's been quite the min maxing adventure to get GS to work out.

This could be a perfect storm of unfortunate circumstances, with Maven, a naturally tanky boss, mods on the invitation, and a relatively low damage skill. Still, I would have thought this build would be able to handle it.

I can't make any more suggestions about the invite - it might just be a 'don't witness that map boss next time you do it'.

I have made some changes to your pathing in PoB and updated your amulet to net you around 40% more damage (https://pastebin.com/dtmCvfDa). Some things to note about the tree: I specced out of impale chance and some of the less valuable damage nodes, and changed the pathing to be more efficient. Using the 'Show node power' and the Power Report at the bottom of the window is very useful for this. The biggest thing I changed was to pick up some jewel sockets, because they are SO powerful. The one next to Vigour only costs you one passive point for 4 jewel affixes. In your current tree, you pick up the Barbarism cluster for an average of (8+4*2)/3 = ~5.4% life per passive on average (plus some resistances). 1 stat on a jewel can roll up to 7% life, and you still have up to 3 more to get some damage. Don't skimp on jewel sockets :)

In general, build guides can provide some useful information. This one I found (https://www.pathofexile.com/forum/view-thread/2618769) recommends switching to a Tidebreaker, and in PoB it does net you another 20% more damage.

Hopefully this helps a little bit, let me know if you have any more questions. Stay safe exile :)