Got a sweet FCR ring upgrade, and found two almost identical +3 summoning amulets in a single run (although I have a +2 amulet with allres stashed, so I sold these).

In order to not burn out of all these LK runs I decided to progress further - still as a bone spear nec. Not too great speed-wise, a bit boring by now, but atleast there aren't too many and/or annoying immunes and it goes pretty safely.
I will probably respec in act 4 as these 2k damage bone spears are falling off, and I have also seen a video of a summoner necro and it seemed fun.

Mephisto was slow but easy, bone prison and keep spamming bone spear. Recast bone prison, keep spamming, rinse and repeat.

...and I found a vipermagi! And it has 34 allresists! And 418 defense... wait a second. I feel robbed.

Some more progress in Act 4, but it's finally time to respec to a summoner. I equipped a 3 ptopaz helm, a 4 ptopaz armor and a spirit crystal sword (of which I missed the screenshot previously, but I will post my whole gear later on). I have hired a thorns aura mercenary for the summons.

I skipped hellforge for now because I missed a turn somewhere and would have had to run back way too much for it. I really enjoyed clearing chaos with a summoner, might keep running it for a while instead of LK and such. The next goal is to complete Anya for the extra resists, but more importantly for the open Pindleskin portal to jumpstart my summoning.

Diablo was easy, summons with life tap survived but did almost no damage. However, every single hit from Diablo reflected like 15% of his own health from thorns, so that works great.
Also, a high level unique ring drop! Which as a summoner made me feel even more robbed than the eth vipermagi.

Act 5 maps were either really easy or really tough, based on what guest monsters spawned. Bloody foothills had lots of javelin thrower cats, dim vision was MVP there. I ran through most of it and went straight to Shenk because of them.
Frigid highlands / Arreat plateau were easy, Crystalline passage was tough, had to skip some physical immune death lords. Amplify damage removed the immunity, but it still took minutes for them to die to thorns.

Frozen river had souls, but I had a pretty lucky map layout where a few teleports skipped most of it straight to Anya. Anya was saved, Malah honored it with some allres buff and Anya gave me an interesting shield reward. I will keep using Rhyme for the allres/cbf/mf for now, but it might be useful later. And finally, the Pindleskin portal is open for some additional quality of life.

I might keep progressing in Act 5 just in case I can actually defeat ancients and Baal to open up terror zones, but I'll definitely mix in some Chaos runs.

A summary of the character's stats/equipment again. Lots of upgrades to look out for, small things like Shako or better boots/jewellery/charms, huge things like Vex or Jah for Hoto/Enigma. Cta runes are also welcome obviously, but I will have to keep a teleport staff switch until an Enigma is made anyway. White/4 socket monarches for spirit, etc. Completing hell difficulty and unlocking terror zones would be the next big thing for now, a physical sunder charm would help out CE and thorns.

I will have to look up some guides eventually on how to defeat ubers/diablo clone with a summoner, but that's very far away for now.

Nihlathak had a close call when he managed to CE me to 20% before I CE spammed him down, but it was smooth otherwise. Ancients were a lot easier than I thought, even though two of them rolled stoneskins it merely slowed the scourge a bit.

All waypoints unlocked in all difficulties. The worldstone keep levels went pretty smoothly, the baal waves were very quick. Might do some baalwalks as well.
Baal took 10ish minutes and had to regather some revives to speed the process up while the evil twin disappeared.