You can use the tether to catch payloads on the way down and boost the tether back up while also reducing the payload’s need for heat shielding
You can use more efficient engines with low thrust/weight ratios to reboost the tether
There are some propellent-free options that use the magnetic field to reboost the tether in exchange for energy (I’m unsure if the energy needs are practical or not)
If you had a way to catch them, I think you could just throw rocks down the gravity well and catch them for a boost too.
This linked article goes into some options for that: https://toughsf.blogspot.com/2020/07/tethers-all-way.html
You can use the tether to catch payloads on the way down and boost the tether back up while also reducing the payload’s need for heat shielding
You can use more efficient engines with low thrust/weight ratios to reboost the tether
There are some propellent-free options that use the magnetic field to reboost the tether in exchange for energy (I’m unsure if the energy needs are practical or not)
If you had a way to catch them, I think you could just throw rocks down the gravity well and catch them for a boost too.