Just confirming answer to topic.
Another question: How often does the challenge score refresh.
I’m asking because I want to know if I should play casually or spam T1 surges. I don’t want to miss on this rewards.
Yes, but can’t be used to cheat the system.
As it says on the announcement page, every few hours.
I wish us console peasants could assist in this challenge 
To arms pc users!!! Slay for your console brethren!! 
And if modded servers count…Do Savage Wilds map servers also work?