I think this is an interesting idea.
I don't like it though because it basically means you can run a Mono-Other and win all the time.
All you need is 6 SoG, 6 SoR, 6 SoD, 6 Spirit Nymphs, and 12 Quantum towers.
You now have mono other. You could toss in more towers / weapons if you want to be better able to deck people and or kill them.
I voted lower attack cost to 1 but I just don't like the synergy this has with the shards.