You've got options Mal. First thing, however, is to recognize the type of terminals you have. Deutsch housings might have either "open barrel" or "closed barrel" terminals.
The "barrel" is the end where the wire inserts in the terminal. Open barrel is the the type with the "wings" that are spread open to begin with and must be crimped down to complete the terminal. Closed barrel is a closed round end that the stripped wire slide in to before the barrel is crimped closed.
If you've got closed barrel terminals look for a Paladin 1461 crimping tool. In the $40 range unless you find a big bargain.
If you've got closed barrel terminals you'll likely end up getting a crimping "frame" (the pliers) and a die that inserts in the frame to match the terminals. These are handy because you can use the frame with various dies to do many different types of crimps.
An inexpensive frame I like is the Paladin 8000. Also probably in the $40-45 range. Then look for a Paladin 2033 die which is for non-insulated open barrel connectors. That's probably $20-25. Sometimes you can find the frame and die bundled together at a discount.