My LS has 15 pieces of Darklight and we only do like 1-2 runs a day to not burn ourselves out. We managed to get one speed run completed in Aurum Vale a couple days ago and that's how we got the Heavy Darklight Armor. We're lucky if we can get 2 chests on a 59 minute clear. It takes no skill to beat it fast. The drop rate is so high we have to moderate our runs cause if we did more then 2 a day we'd have full darklite gaerz alraedy, lul.