Lopert has writen up an awesome script to aid in timing enemy ubers.
From the readme:
Author: Lopert
Special Thanks
---------------------------------------------------------------
klown, whom I know through QuakeLive, and who gave me his
config and item timing script.
Jaeger, for hosting this on his awesome website.
Objective
---------------------------------------------------------------
Inspired by an item timing script from Quake,
I decided to see if it was possible to create a similar
script in Team Fortress 2. This script allows you to easily
calculate the fastest possible time the enemy team can have
their uber / kritz charge ready.
Installation
---------------------------------------------------------------
Follow these steps.
1. Extract the .cfg files from the archive to your
Steam\steamapps\<your account>\team fortress 2\tf\cfg
folder.
2. Add the lines from the
ADD_THESE_TO_AUTOEXEC.cfg
config file to your personal autoexec.cfg,
this will bind your numpad keys to the required aliases.
You can delete "ADD_THESE_TO_AUTOEXEC.cfg" once the lines
have been added.
Usage
---------------------------------------------------------------
1. Press the NUMPAD_PLUS key to prepare the number keys, this
tells the script that you wish to time uber/kritz. (More
"items" may be added later, such as timing jarate, etc. I
felt the only real important thing to time at this point
was the medic's charge)
2. When the enemy medic spawns (you can see this by holding
the scoreboard open), make a note of the current time,
and enter the seconds on the NUMPAD.
Ex: If the enemy medic spawns at 8:46, enter 46 on the
NUMPAD.
3. This will send a team message with times stating what the
fastest possible time the enemy medic can get uber/kritz.
Ex: Entering +46 will generate
"say_team Enemy Uber @ :06 - Kritz @ :16"
You can downloaded it here.
