Step the data rate down by the region's back-off table before sending.
Set the ADRACKReq bit, asking the network to answer.
Re-enable the default channels and set the repetition count back to one before sending. Only TS001-1.0.4 takes this step.
Go back to the default transmit power before sending. Only TS001-1.0.4 takes this step.
What a back-off says to do with one uplink.