The combat aspects of it? Nah. You'll have to test it out in the field, I'm afraid.

[Preferably against a very weak demon that even a complete novice devil summoner could overpower with their own mortal strength, rather than a bigger, nastier demon that'd steamroll her.]

Preferably against a weak demon, and maybe with allies to back you up. Then, if it malfunctions, you've got a better chance of surviving. Humans on their own are pretty weak, but there's truth to the phrase "there's safety in numbers"!

[Whether to fight together or to play a game of "demon gets the hindmost", he didn't clarify.]