2010-06-15 Totem armor's effect is applied no matter why the enchanted permanent would be destroyed: because it's been dealt lethal damage, or because it's being affected by an effect that says to "destroy" it (such as Doom Blade)
The Water Crystal While The Fire Crystal is very versatile in Red strategies, The Water Crystal wont go in every Blue deck
I can see this seeing plenty of play in cEDH and Casual Commander alike
Falkenrath Aristocrat is a bit of a beating with four power, haste and evasion offering a scary clock or a great answer to a planeswalker for fairly low mana investment
In extreme cases where life isn't an issue, you can even cycle through the entire deck to know your choices and then play knowing what is coming, while in situations where life is precious you can usually get by with minimal loss
Forging alliances can help players strategize and either neutralize the main source of their threat or eliminate them altogether