Enki's Arc Witch Memorial Page

I'd say curse removal is better, you can get poison immunity from Shakari Pantheon and even without that, there's barely a situation where you will get deadly poisons applied. You could possibly move curse immunity to your Sulphur Flask, that would require you to be a bit more cautious with freeze strongboxes tho.

Wanted to recommend to open up for jewel sockets asap to use the Fragilities, but looks like you already did exactly that.

Also grats on the Inpulsa's, definitely a worthy investment :)

You can pretty much just orientate on my standard gear, including the corruptions and enchantments. To make it even better you could use an Elder Essence Worm and Mark of the Shaper, but that would make capping resistances extremely difficult and if you have to give up DPS somewhere else for this, it's probably not worth it.

You're currently using MF gear, so can't comment much on that. Your sceptre could use an upgrade, Doryani's Catalyst should be cheap by now and would be an increase in both damage and shield charge speed.

Your flasks are missing quality and you made some mistakes in the gem setup, Arcane Surge is leveled way too high and the Lv19 CwDt Cold Snap setup is pretty useless at that high level, better stick to the guide. There's also some inefficiencies in your passive tree, you took some of the less impactful nodes reserved for higher levels while leaving out better nodes on the way.

I've also noticed you're using two Item Rarity gems in your 6L, they don't stack so you're basically wasting one socket for nothing.

What I do is simply spamming the same connected T14/15 maps until Elder Influence spawns there, and then spread it unto the connected T16 and then just do them clockwise.

Congrats! A little correction, Uber Elder is just the encounter on elder-influenced Shapers Realm. Still a nice achievement, keep going!

I'd rather replace the rare ring, Essence Worm is just too big of a damage boost.

Pretty much just the four slots you've already pointed out, everything else looks good. You could also try to farm for a better boot enchant and switch the mana flask with a Wise Oak if your total Lightning Res is highest, or you can plan that out with the upgrades.

You can pretty much ignore tooltip DPS with this build, it's meaningless since it doesn't take all the hidden damage modifiers into account. As long as you stick to the guide in terms of upgrades, it will be enough damage for anything in this game.

Your gear is overall not bad, what you should do first is get two Fragility jewels to gain Onslaught from Ahn's Heritage, and level your Arcane Surge to Lv8. Next make sure that Wrath is actually activated, cuz 11k tooltip is way lower than it should be with all that and a Lv20 Arc.
To boost your damage further you could look out for an Opal Ring, better DPS amulet and a Lv21 Vaal Arc. And if you haven't done it yet, upgrade the listed Pantheon choices for more survivability.

Gear upgrades shouldn't be all that expensive, you can often save lots of currency by settling for stuff with mastercraft potential, for example boots with 2x high resistances and an open suffix to add a third with Haku instead of boots with three high resistances and other good mods. Poeaffix.net can help figuring out what affix slots are open on an item, and what mastercrafts could be added.
My personal gear was mostly selffound or selfcrafted, only the rare ring and belt were bought on my Standard Arcer, and some of the uniques. SSF was obviously all selffound/crafted.

I was under the assumption that you've already collected all 15x Memory Fragments. After that is done, you need to kill Shaper and talk to Zana inside Shaper's Realm afterwards, then meet her at the room behind the Epilogue map device to get the Elder's Orb.

From that point on you can spread Elder Influence onto the T16 Guardian maps. No need to spawn Elder at all, just run the same connected T14/15 maps until Elder Influence appears there and spread it onto the T15 if needed, then you'll see that all T16 Guardian maps get the Shaper Influence background. The T16s are all connected with each other, so all you have to do now is do the T16 right at Elder Influence first, and then the other three clockwise. Uber Elder will now spawn on Shaper's Realm and his four guardian on the T16s.