Myrmecophila often needs very bright light, 4000fc +, higher than almost any commonly cultivated orchid. The 70% shadecloth may be too much. Try gradually moving to higher light level. I would also cut the fertilizer back to every other watering. And realize it can take a full growth cycle or more for a change in conditions to trigger flowering. The plant appears to be in excellent condition, maybe almost too lush. Myrmecophila often looks a little dry and beaten up when they bloom well. Good luck.