Bolinbrooke said:

Hephasto has no better odds to drop higher rune classes than any other monster, he can just drop them all.

Well, actually, Heph has one of the best chances of dropping a rune of any monster..

..but "one of the best" = "a tiny, tiny bit better than all the other damn bosses".

The Countess is obviously the special one. But the runes she can drop are far from the top runes in the game.

When it comes to Zods, Hell Diablo & Hell Baal are the best - they have 7 picks, each with a 4.3% chance of being "Act 5 (H) Good", the TC which eventually leads to runes, including Zod.

Hephasto and Nihlathak are next - they each have 5 picks with a 5% chance of being "Act 5 (H) Good".

Then come various other very high level Superuniques who don't have their own TC - they have 2 picks with a 6.5% chance of being "Act 5 (H) Good". Then very high level random bosses, with 1 pick at a 6.5% chance.

btw the odds of a "Act 5 (H) Good" item coming out as a rune are 14 in 130.. and the odds of it coming out as a Zod are something like 1 in 770,000..

I'm not sure where the "one Zod in 153,000 runs" came from, I think it is MUCH lower than that.

So, yeah, maybe Hephasto has twice the chance of dropping a rune as your "average" Superunique.. but the chance is still only something like 2.66%.. he's no Countess!