I've gotten 7 imago loops and 5 grasp of maloks in 1 week. Before? I've gotten 1 imago loop and 3 grasp of maloks(I didn't farm it during that easy nightfall) the whole year. Don't get me wrong I've gotten the class items and the gauntlets in between but despite that I've received way more imago and grasps in this week than the entire year before the skeleton key. Those "strike director" that you speak of has an insanely low chance that it wasn't even worth it, only nightfall was. So I wouldn't even go there if I were you. In current form, I can just do strikes after strikes and keep getting keys. Then go to the strikes I want to receive drops from and receive it from there 100% a strike specific loot from a strike I want. Sure it has the 50/50 thing with which strike specific but that was always the case before simply because there are 2 strike specific drops in most strikes.