I just bought two units of Death Troopers and I absolutely love the models.

I've used this model for my unit leaders in both squad :

And one of those for the unique DT-F16 heavy weapon upgrade, as it's pose seemed to fit well with "compel" :

What could I do with my second one?

- Use it as an Imperial officer personal upgrade in casual games?

- Turn it into a corpse and objective token?

- Paint it red to use as a custom Commander in some homebrewed mission/campaign?

- Sculpt a raised middle finger on it's left hand and put him on a vehicle?

Well, I believe the one with the raised hand is supposed to be the standard squad leader, and the first one is DT-F16, but it really doesn't matter. As for what you should do with the spare mini, depends on what strikes your fancy. I turned two of mine into Clone Commanders, so they'd likely work for Generic officer proxies or custom commanders for something. A special vehicle commander passing on a rude, probably Corellian, hand gesture might be funny, though not my cup of tea.

My first attempt at a conversion (with Clone Paratrooper head from Bucket Head Bits).

And my more successful attempt (in my opinion) turning him into sorta Appo, complete with dropped lightsabers from Jedi insurgents.

The Deathtrooper minis are some of the best in the game, so you've got a lot of really good options on what to do with them.