Add more ways to survive
Right now your durability option is to go down guardian. It is basically mandatory to all builds. Sprawling trees often have a defense tax, I don't have a problem with that. My problem is that the tax isn't interesting. Nothing like 50% of damage taken goes to mana. No parry grants DR for a duration scaling with say dex. Theres so many ways you could add this tax and give the player agency on how they want to spend it. But instead what we have is you MUST cap out the guardian tree. It's lame af and makes guardian less of a playstyle and more of a requirement.