Good luck I was around level 100 with Nimbus before I finally got my last one. It took me over a month just for one red border and from about level 30 with Nimbus to around 100. I had the rest before they nerfed the drops luckily. After the nerf heroic patrols never dropped a a single one for me and I did at least 5-10 a day some days far more than that. Even had others helping and most of them just gave up on ever getting the rest of what they need.