The individual Sannin are considered stronger than regular Kage, so he should logically not get past Jiraiya. Tsunade, though slower, was still able to keep up with him, and I imagine Jiraiya could as well, or at least stall out long enough for Sage Mode.
Rasa's depends on A's ability to break out of his sand. Although Gaara's sand in the summit blocked A's kick, he was not exactly going at full power either. A managed to sever Hachibi's horn, the second strongest of the nine, so I imagine Rasa, whose sand is mayhaps slightly stronger than Gaara's, and is more so renowned for holding down Ichibi, might falter at full power. However, this cannot exactly be confirmed. If one believes the Gold Dust can bind A, Rasa. Otherwise, I believe it would be comparable to Kimimaro breaking through.