That's easy enough to deal with. Either timestop out at the last second, or punch a hole into the ground above us just before it lands (Akane can finish punching her way out after that).Well, really my biggest complaint is that the plan seems likely to end with Akane reduced to a fine red paste.
That's the point of Sayaka's platforms: leverage for Akane to push against. The platforms are magic. They exist in a fixed point in space when created; they don't have to have 'lift'.And again, how is Akane exactly going to slow down the city's decent? Her strength's worthless since she'd need to push or pull against something, so she'd either need a really strong flight ability or a floating platform that has enough lift to counteract the city's weight.
In any case, Gadjo's version does seem more viable. Assuming the overall mass really does disintegrate, anyway. Though if it does, that puts questions on how the building will hold up, though we can probably jury-rig something if that happens.
[x] Gadjo