Which meta gem tbc tank

So I have a paladin tank, this is from the most recent upload 1162c10ebfe44395bd141011768a36c0

and I notice it has thundering skyfire? is that correct? I assume its for threat but wouldnt 18 stam be better? more attack speed feels like I would get parry gibbed or is it for mana during seal of wisdom?

so I checked again and it still recommends Thundering Skyfire Diamond for prot paladin. Why?

We never give zero value to threat, even when choosing “all defense”. 18 stamina is really small and the stun resist isn’t given any value. It’s not a very good meta gem unless you really want that stun resist. Attack speed is really good for threat on a paladin.