We would reject the causative sense of the verb in favour of the more secure meaning of 'to lead in a triumphal procession'.
10.
One way to consider the rhetorical structure of these verses would be to treat the narrative of v. 13 as the subject which is redescribed by the metaphor of leading in triumph.
11.
According to Hughes (Second Corinthians p. 78), 'Paul is nothing but the vessel or the instrument through whom the fragance is released'; but there is no reason why di' hemon should be understood in such a passive sense.
12.
Martin believes the word to be implicitly directed against 'those who claimed to manifest the divine power in their lifestyle and ministry' (2 Corinthians p. 47).