This is a question that I'm not sure that I could find the answer in elitistjerks.com because of the number of pages going on in some of their longer lasting threads (Enhancement Shammy thread is 101 pages long, GG.)

When to use Windfury Totem and when to use Grace of Air Totem. I've not followed the changes pre-BC and even during BC so I'm not sure whether the concerns below are still valid or not.

From the above post, it's in the following scenarios :

Windfury
A DPS warrior is in your group - Will the 20% proc rate cause issues i.e. the crits raising their threat that they pull aggro off a prot warrior who is not in the same group?
A warrior who is tanking is in your group - The 20% proc will increase his threat more? If so, by how much (roughly)?
A warrior is in your group - Repetitive statements.
If no warrior, more than 1 sword rogue is in the group - Why must be more than 1 sword rogue?

Grace of Air
A feral druid tank is in the group (ie, bear... not kitty) - druids do not get buffed by Windfury but by Grace of Air
A prot warrior is in your group on a non threat limited fight with high damage components - because of the 20% proc of Windfury is less uncertain than Grace of Air steady bonus?
Any combination of more than 2 hunter/druids is in the group - Hunters get more damage done with GoA because of agility?

I hear different viewpoints about when to use the above from different parties. Wanted to hear from those who are leading raids or helping with raids. Melee love Windfury Totems but Raid Leaders seem to prefer Grace of Air for tanks to learn fights better and to hold boss better (WF procs, more headache for the tanks to hold aggro). Melee are to have a slow offhand for Windfury - how slow is slow?

I'm looking for different viewpoints and what you guys do both as a raid leader and raider to manage these 2 totems. Especially in the 25-mans where most of the boss mobs are dropping the aggro list.