Are TF2 taunt bundles clean or dirty

Yes, the Amputator taunt is useful. You can use the Medi Gun to heal people individually and get your ÜberCharge up, but you can save a lot of people's lives with the Amputator taunt.

For example, if a Pyro charges at a group that you are healing one-by-one and burns a lot of them, you might not be able to extinguish everyone before they die. The Amputator taunt will help in this scenario by quickly extinguishing all your teammates at once leaving no one behind.

I personally love the Amputator because it helps a lot of people especially when there are a lot of needy people who want you all to themselves. Using the Amputator taunt you can share the love.

You can read more about the taunt here.

Here's a quick comparison of healing methods:

                   Heals*  Healee  Duration  Charges**
Oktoberfest         11       Self      4  s     0
Medicating Melody   25       Team      4.2s     0
                    (if in sight and range)

Medigun             24/s   Target        -   2.5 %/s
Kritzkrieg          24/s   Target        -   3.13%/s
QuickFix (beta)     36/s   Target        -   3.75%/s

*  300% for targets that haven't received damage in the last 3 seconds
**  50% for targets that are at 142.5% health or higher

My best advice is to predict where the enemy is going to go. For example, if an enemy was going down the vents in Turbine, you may want wait behind a bend and initiate your taunt kill, so that it will hit the enemy when he turns the corner.

One particular taunt kill I got, I saw a Soldier coming up the path. I retreated and waited behind where he was going to pop out of, and taunted.

If your goal is specifically to get a taunt kill, you may want to favor certain classes. Heavy has the fastest taunt kill, with Pyro's Hadouken slightly slower than the Heavy's.