Nice list! I am going to have to save this one off to the side for some hints for my Derevi list

I know it has been about 2 years since the last update, but you definitely should update the list, New Capenna gave some goodies to use. I went more of a blink control sort of list, it still does stax to an extent.

Mana Vault is really good ramp in derevi. Displacer Kitten was also a nice recent addition.

I'm not sure what your meta is like, it may be good to add in a few more win conditions to help push the game over, I took apart a Hokori stax list that honestly would only stall the game out until my opponents could cope with the taxes and everything and blow me out of the game. When it did win it was honestly just a drag for everyone, myself included. The Derevi list I have was sort of an followup to the list and I went more of a tempo route with it over time as it ran into the same issues as the Hokori list. People seem to frown on big finishers in competitive formats, depending on the build, they definitely can have a place and I tend to include at least a few in my edh lists for some top end begin to finish the game. (I have a cEDH Urza list that seriously runs eldrazi in it and has a high win percentage, even against expensive turbo decks).

Here's my Derevi list if at the very least it can help give you some hints for some new adds for your list, I appreciate advice on it, the list still needs some tweaks before I'm happy with the strength of the list. Birb Goes Brrrrrrrrrrrr