Mushy

Mushy the Mushroom looking Nimiod is build as an allrounder while preserving as much surviveability as possible.

Surviveability:
Both Decaying Matter and Varmpirc would damage us, but Vampiric only damages you under the sun -> There is no sun in the abyss!

Hence its the best allround healing ability.

To ensure we survive later levels I added Proximity Shell.
In Combination with Decaying Matter we get up to 4 stacks of Armor at a time.

Damage:
The catalysts are the main source of damage.
The low critical hit chance should normally be taken care of by choosing Subzero Node, which I did unfortunately not do and only realized later in the run.
Subzero Node provides the critical hit chance, speed and fire rate needed to round off the build.

I highly recommend using Subzero Node if you want to try this build yourself.