You wont make many friends if you cast an Armageddon, since not only are you denying players resources, something no one likes, but youll likely be dragging the game out for a long, long time while players try to rebuild their board.
Its hard to answer a card like this cleanly, and, once your plant creatures start to grow, your opponents are pretty much done for
For example, if you have two mono-Blue Commanders that dont normally have partner, you can mash them together in the Command Zone in Commander Masters limited
Launch and Cruella de Vil, Fashionable Cruiser are your only answers to Evasive
And yes, you can equip another mobilize creature with it to stack the triggers
On top of that, you will likely also have to organize all your spares, including the many copies of commons and uncommons cards that you may have pulled from booster packs