Gaara -.- what has hurizen shown to get passed his defense let alone knock an airborne GaAra out of air
Hiruzen high diff.
-Hiruzen has excellent speed and mobility so it isn't going to be easy to overwhelm him with Sand.
-Hiruzen as shown to have some type of sensing feat, so he should sense chakra built and act accordingly like Muu did.
- Emna and Doton wall also helps add leverage so he doesn't get caught in a wave of sand.
- Raiton, on top of Clones doing the same Raiton stream, finishes this off.
Didn't Hiruzen round the edo hokages via smell? Could be wrong tho. Even so, Kuba had stated that Gaara's sand smell of blood, só he could still sense it.