Thanks for the advice! So it sounds like if I want to find dice I'm [probably] better of NOT using a Rune of Wonder - have I understood that right?

Potentially, but it shouldn't matter all that much in the long-term. I just don't know for certain how a Rune of Wonder *"Doubles the chance of finding Rare, Epic or Legendary items from chests"*. That's all back-end wizardry, and you can only guess at the math involved from the client-side.

Last we knew, the base drop rate to get a set of dice (any rarity) was about **one in four** chests redeemed.

If the RoW doubles the odds for __every__ Rare/Epic/Legendary, then dice odds skew down to **one in five** because about half the dice are **Uncommon** rarity.

If the RoW doubles the odds for only Rare/Epic/Legendary __cards__, then the dice drop gets closer to **one in six** because *all dice* would be at a disadvantage.

Worst-case, the RoW could lower dice drop by 8-9%, but it is likely closer to 5%. Again, it's all best-guesses trying to sort out black-box stuff. The Treasure system is an arcane beast we may never truly know.