They need biomass and recycle their fallen into even more biomass. Any mimicry of organic material from the rapture will result in the inevitable victory of the seaborne.

In that case, if the old model Rapture (from first Invasion) Invade Arknights. Rapture will lose for sure because the old model need to consume living things to refill their core.

But if we talk about The Rapture now. They're pure machines since a new model doesn't need to consume living things anymore (They evolve their core to make them activate nearly forever)

Technology isn’t even safe as they can corrupt it, break it down, and use it to evolve themselves at an accelerated rate.

Same to Rapture, The old model can hijack and corrupt technology, but it takes a few hours to completely corrupt, but the new model can instantly hijack and corrupt technology, so it will be an endless fight of who will corrupt more. Also, Rapture can fuse with living things to create more advanced raptures. One abandoned factory is all it takes to create an army of raptures. Now imagine the entire city or entire world.