I've read online all about the Solstice armor quests being odd, but the fix that people have mentioned doesn't work for me. My Hunter has on the Majestic Strides, and the first objective doesn't progress no matter what I do. Its a Void week in strikes so I started out using Voidwalker. I needed Arc kills, so I tried Arc Strider. I read on Reddit that it works if you used Solar but I tried and it did not. I've tried all 3 classes, got kills with primary, special, and heavy weapons. I've gotten grenade, melee, and super kills with each class. It's still sitting at 0/600. Is it bugged? Maybe a workaround or something is around? Everything else that I have to do for the other pieces is simple (Patrols, heroic public events). This is the real last thing that I have to do to progress the armor upgrade quests.