Explosive Treap build advice: What to work on next

I have an explosive trap trickster that can (by now) handle most T16s comfortably, but is still lacking damage and tankyness.

I am not sure what to work on next, though: Most things that come to mind are a lot of effort to improve/acquire. This is my first character I actually took this far, so I am lacking a bit of experience how to progress a character into endgame.

https://poe.ninja/builds/necropolis/character/VeaaC/Klomper