What's the best use of stones?

I finally got deathwave. What should I do with my stones now? I have every module except galaxy compressor. Is there a way to get that without having to hopefully just pick it randomly? What's my next step and what Labs should I get to maximize my growth?

I finally got deathwave. What should I do with my stones now? I have every module except galaxy compressor. Is there a way to get that without having to hopefully just pick it randomly? What's my next step and what Labs should I get to maximize my growth?