Lane phase

L-R is fine, HVM early only if you're struggling with LH

Fill vital slots (pick 1)

Core Path

Torment Pulse Rush: CF doesn't give much value for farm, TP is your strong item

Secondary

Utility items that you will sometimes neeed before your 6ks cores.

Ball Up

Imbue all on 4

Late Vitality 1

Default.

Late Gun

Least important

Late Vitality 2

Alt.

Notes (CF/SH

I tested this a lot to see, but coldfront is largely ineffective as a farming tool now, and not great until you have maxed ball
You farm slightly faster, but not meaningfully faster with CF vs
SH
Neither farms significantly faster than the laning stage items, and Torment Pulse is really your power spike
So when it comes down to it, you are going to delay Torment Pulse only if slowing hex will help you deal with a problematic enemy, which it can a lot
The reduced dash distance + movement disable is really strong in to a lot of current meta heroes
CF has a movement slow attached, but since it doesn't disable movement abilities, it's less valuable.

More notes

Past the mid-late sections, you are in kind of uncharted waters
If you finish this guide out you're above 80k souls, which would be a massively late game where most characters will start shredding you, ball or not
So while this guide will help, it's very much a guide; you might find that you desperately need metal skin over another T4 spirit item, and if you do, use that
Once you have your core 6k items (MC/PS) anything else is going to be small improvements on top of that; adjust accordingly.

Viscous SKill build

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Viscous Build Description

Updated with some new insights.

Rush torment pulse, slowing hex optional but strong against lots of heroes, resto locket for sustain.

Ball has a lot of armor, use it well.