He meets Rus's eyes gravely to nod, communicating his appreciation. Best at this point not to explain why he needs Slughorn where he is; it would signal to Rus that 'for now' might be a longer period than Rus would prefer. "The order doesn't matter to me, or to the rats," he shrugs. "The only problem I have is if you haven't been able to find the hair of someone who roughly resembles whoever's at the top of your list."
"You certainly can."
"I think I'd dislike that as well," he says gravely, and reigns in a snicker of which a snort only briefly escapes as T2 yipes. "Yes, well, very inconsiderate of him of course, but in his defense he probably expected you to be aiming for the dartboard."