Requires a Dummy account
Open the command console: ESC > Gear Icon > Under the keyboard tab select Advanced > Check off Enable Developer Console
Press the ` button to open the console and type:
map cp_dustbowl; hostname "boost"; sv_lan 0; sv_cheats 0; (I had to input this twice to be detected on my LAN for some reason)
That will create your match. Choose Medic on the Red Team. Then type the following command:
mp_teams_unbalance_limit 0; mp_idledealmethod 0; mp_idlemaxtime 0;
Put the Dummy account on the Blue team and a 2nd Dummy Account to red or add a few bots using:
tf_bot_add red;
Fully charge your Ubercharge. Have the Dummy attempt to capture a point. Use the Ubercharge on the Bot trying to defend the point or on the 2nd Dummy account and make sure they kill the Dummy Account on the Blue team.
This might require more than 1 bot as the first bot will likely go Engineer which can be unreliable.