Superior Rune of Speed
I would assume that just like every other speed bonus, only the highest bonus applies. So, I don’t think it would stack.
Would be nice if so, but I highly doubt it.
Duty is heavier than death.
1 – Do you mean Rune of the Traveler? Rune of Speed is just 5% (off the wiki).
2 – This really doesn’t belong in the Living Story forum.