He knows the chances of not hitting are rather high, due to the amount of Double-Teaming going on, and he's fully aware that Iron Defense is cutting down on how effective it's going to be to begin with; at the same time, Earthquake is honestly the best he has, and he's a shameless ground-type user most of the time anyway whose primary strategy, when Archer is not screaming at him to do otherwise, is "Spam things." And so he will be spamming things and fully prepared to have Carlisle taken out the next time that Metagross hits him; he's trying to plan for what he's throwing out there next, he's thinking the Ninetales if Carlisle goes down in the next turn. Even if Dorian kind of hates him because this is the second time running that he's thrown him out in the middle of a hailstorm, um.