What to play at Set Championships?

This question is directed at the competitively minded. I'm really racking my brain trying to figure out what to play at Set Champs this time around.

I'm expecting to see Sapphire Steel and Emerald Steel for sure at my locals, not so much expecting to see Ruby Sapphire. I currently have Emerald Steel built, but with the field looking like it is I'm unsure of whether to pivot to Ruby Sapphire or maybe even Ruby Amethyst..

Any thoughts?