Can someone help me with Devil Dice?

So, I've unlocked devil sword dice and I'm working on a list (Typhoon, Devil, joker, growth, random growth) but I don't quite understand how to pilot the deck. I know the damage scales based on the dot count of the chosen dice, but as well as the total devil dice count.

When the duration ends, the chosen dice loses half of its dot count, and devil goes up. What do I do with the now halved dice? Do I merge them together? Do I throw them into my sac pit and up other die counts?

I think the point is to keep up as many dice with high dot counts as possible, and keep farming random growth for more high dots, right?

Can someone give me any advice on piloting, or things I may be misunderstanding?