I have 70 Radianite and it says it can be used to upgrade skins but also something else, what else can I do with it, as cool as the skins are I don't have a desire to spend money on the game at this moment in time. So is this Radianite just...

I recently came back to the game after leaving during the first half of act 2 and I’m not sure if I’m the only one but I feel like Skye has way too much flashes and they last for so long, and paired with a breach and even a phoenix the game...