I'm aware that having at least 20 shards will guarantee you a drop of basically anything dropped in the raid (including mouldering shards) when killing Oryx. But my question is, can you stack a lot of them and have a better chance for much better rewards? For example, if I've got 40+ shards would it be better to just spread them between two of my guardians or keep all of them on one guardian? Would I be more likely to earn better rewards by dividing the shards or stacking them all?