Are Searing Exarch/Eater of Worlds Atlas passives worth it?

Hey everyone. So, I'm pretty new, have only been mapping for the past few days (currently about T13 at level 88), and I have a question. I have been levelling Strongboxes/Harbingers/Harvest on my Atlas tree, as they looked like good options for a beginner.

Harvest and Strongboxes have been cool, but the Harbingers have been a bit lacking. When my first Ember and Ichor dropped, and I realised I could reroll implicits on my favourite gear, I was very excited - so I've been thinking about respeccing the Harbinger nodes to Exarch/Eater ones (it may help to know I'm not using scarabs, due to Unwavering Vision - you can tell me if you think this is mistake or not, I just liked the extra 20 passives). I just want some second opinions on whether this is worth swapping Harbingers out for. All the different farms/methods to progress mapping are quite complex so treat me like a total noob.

Thanks everyone:)

ps. I have no idea how to link my Atlas tree, but if someone wants to see it, and can link me a way to share it (it's not on path of building, as far as I can see?), then I'm happy to do so.