Nice1
I use a similar devotion setup on my PB Witch Hunter
https://www.grimtools.com/calc/r2BzmWB2
Try swapping Lotus for Panther, Eel for 3 nodes in Wendigo and 1 point from Lion to starting green node in the center. It’s the setup I currently use and I believe you would get a bit more out of it.
You could also swap at least 1 Sanctified bone for Living armor. You get much needed elem resist and keep chaos resist while getting more OA and absorption% (you get tons of racial damage on Chthonics from set anyways). You can then swap those fire&lightning augments for something more appealing to overcap, or even to stack DA. Greaves of Ill Omens are your friend, especially for much needed stun resist. Solemn Mark is a great defensive option for your medal slot.
Lastly, I believe you would get more out of Seal of Blades/Seal of Might combo than out of 2x SoM. Those 2 augment slots I mentioned earlier can help you compensate.