I’m also using that build. I was making a similar one and adjusted it when I saw his video, since his spec is more efficient that what I was going for.
And I recently also did the EoC fight, though I didn’t die. It’s an annoying fight when your build isn’t fully online yet, but I’ll give you a few tips based on my recent experience with it:
-Don’t bother fully summoning your zombies at the start. Just send one every now and then.
-Your minions will die a lot, so you need to keep resummoning. Which is why we don’t bother with zombies too much until he’s close to kill threshold (16%).
-Your golem will attract most of the aggro, so you can stay kinda distant to the emperor and not worry too much with the breath attack, since that will mostly target your golem.
-Keep moving all the time. Especially because when you resummon your mage you will teleport and there’s a high chance your golem will be on top of you, so move away.
-If you keep moving near the edge of where his big AoE hits, you can easily move outside and press A to bring your minions outside as well. Then quickly go back in.
That’s it, mostly. I’m also playing this because I like lazy builds, but in this fight you can’t be too lazy. You have to keep track of your minions and have to keep resummoning them, so you’ll need to hit all skills. The main thing is to keep moving close to the border of his AoE circle so you have time to move out and back in.
As for gear, you can keep farming that mono or you can go clear the monos from the bottom path (they don’t give great blessings, though), though I would just advise you to keep farming that same one and trying the Emperor every now and then.
You don’t lose stability on death in the boss fight anymore, so you can just try him again and again, but that’s frustrating. Do a few monos, try the boss, do a few more, try him again, etc. If you get some decent gear to upgrade, all the better.
At this point, your gear will give you more than passives. If you’re CoF try to target prophecies that will help your gear. Lock them so you only spawn prophecies in monos.
If you’re MG, try to get the baseline DPS gear from the bazaar. Just a few yellows in the right spot with minion damage should help a lot. You can very often get a cheap yellow with just 1 or 2 decent affixes that you can craft a little more on.
Something that might help as well is “dubious replacements”. Basically, until I get the gear I need, I’m using Sinatha’s set, which gives some minion bonuses and +2 to all minion skills (which are all of them) and I’m using the acolyte relic for another +1 skill to all.
For this last one, I’m actually farming them a lot (buying them in bulk and trying to get good rolls). Though it’s not easy. After about 12, I’ve yet to roll even decentish affixes for this build. Still, in theory, this relic can be BiS and I like the WW mechanic, so I might keep on it.
EDIT: One thing that might help as well is to ignore low life at first. Just go for full health, since that lets you pick up useful affixes for chest/boots as well. Once your build is rolling, you can try to work on low life.