Farming Routes for the Petrified Echovald Saplings in The Echoval Wilds. They drop Petrified Echoval Resin.
You can toggle them in the GW2TacO / BlishHUD menu -> Tekkit's Guides -> Expansions -> End of Dragons -> The Echoval Wilds -> Petrified Echovald Saplings. If you don't see these routes in the game, double-check if you properly followed Installation Instructions. If you still have issues, let me know in the #all-in-one-issues channel on our Discord