Just read the article pls:
http://wowwiki.wikia.com/wiki/Stance_dancing
I agree that shattering throw isnt always effective. When u cant expect to kill the enemy after shattering his bubble/ ice block/ hand of protection then its often better to not use shattering throw at all.
U need to keep in mind though that when u play a double dps setup or 3v3 there is a second damage dealer in ur team.
Even if u lose pressure from using shattering throw the second dmg dealer is assisting u in dmg and increases the chance to land a kill.
Also, the lost pressure from switching to battle stance in order to use shattering throw is much smaller than u might think.
Its not like prot warr can't deal any dmg in battle stance.
In 3s u are usually not arp capped so the 10% arp from battle stance and 5% increased dmg come into play.
U can use pretty much all offensive abilitys beside shield block and revenge in battle stance.
After using shattering throw it makes sense to stay for a while in battle stance to avoid rage starving and to keep the pressure on the enemy and maybe land a kill.
After all its all situational. Some ppl here are suggesting to stay in def stance 24/7 and never used shattering throw at all.
This is simply wrong and limits ur capabilities.
So Ill just repeat what I already said: When u stay in def stance 24/7 u dont play ur prot warr to its full potential.
Gz u got me there.
I accidentally wrote heart instead of Heroic Strike.
/applaud