Now you need to have 500k, but the draco value is still 104k of dark, only you need to have saved 500k before
About evolving now that you reach 40 focus on increasing your Power, this is more important than level.
The level will be for unlocking places and options, but your power will always be with your level or even higher.
Focus on your constitution, chi, try to take out a rare spirit with those daily notes, let your character hit monsters that can drop skill books when you're not playing for example.
The achievement towers are very important for you to increase your power.
And start looking at your rare gear and your codex
Thank you very much for the tips I will try to apply them, also I always try to focus on the power and not in power up now I'm 17% of climbing to level 40, the tower you mean is the higher you get the monsters are getting stronger?