What's the deal with IWAY Builds?

I still don't understand an IWAY team, do you just get 2 people to die so you can all get insane buff of regen? Or is it 1 insanely fast attacking thing because people suicide? Or is it some obscure mix?
What is it?

I believe it's usually a W/R with a pet, and they use "IWAY" when the pet inevitably gets killed.

I would think that it would be obvious (assuming IWAY functions like a necromancer pet spell, since it needs a dead thing to work), just bring a necro with Corpse Transversal and when something on the other team dies, use CT to negate possible IWAY and poison the warriors.

If it doesn't work like that...I don't think that it's possible to stop, since it casts fast enough that you would need perfect timing to interrupt (read as-dumb luck). If it can't be interrupted because of its cast-speed, then it's awesome! I mean, there's no chance of IWAY being nerfed because of it's 10 year cooldown timer.

Thanks for the info!
BB

It doesn't matter if the allied corpses are expended, they are still dead on the battlefield and thus "feed" IWAY.

You don't stop the use of the skill, you stop the warriors from being effective with other means, like Aegis for example.