I decided to switch into a clunky but tanky build this league. I am enjoying it though, and thought I would share.

Phantasmal cremation can put out some real damage numbers while also being quite tanky, though it is absolutely a clunky mapper due to its two-part nature. You have to throw out corpses with unearth, hit cremation which lights pyres, and then rapid-fire chuck more corpses into the pyres which explode for a portion of their maximum health. The build does all that it can to scale up that corpse health as high as possible.

Here is the path of building. I don't know how to make it compute the actual damage given the extremely high level corpses being spawned by unearth, so don't take the PoB damage as the damage the build actually does. As you can see in the video, it is far, far higher.

https://pastebin.com/9qLtKDL4

My character profile

https://www.pathofexile.com/account/view-profile/FilthyMonkey/characters

Here is an example wave 30 simulacrum in about 45 seconds.

https://www.youtube.com/watch?v=ImeTAVCyy08

I am largely following Gryph's build here. The first post is a non-crit version which is a bit easier to start with (though still expensive). I am using a crit version he made a bit later in the thread.

https://www.pathofexile.com/forum/view-thread/3250993/page/1

For anybody who wants to try the build, I would recommend actually using viridi's veil rather than the crafted gloves for the non-crit version. You can get 98% of what the gloves have cheaper and more conveniently.