Per my question, the answer provided contains a screen shot of a post-boss summary and obtaining a number of premier balls to capture the raid boss.
There are various bonuses that go towards primer balls, in which case this totaled to 11. When I did a raid, the number of premier balls I received as 14.
What are all of the bonuses that go towards obtaining premier balls, and how can I maximize each bonus to receive the highest amount premier balls?
Best Answer
According to the PokemonGo Hub, a data mine revealed that the following influence how many Premier Balls you receive:
All of these seems to hold true based off the screenshot in your picture. One source suggests that the level of your Gym Badge with the gym influences how many you can receive as well.
The Silph Road Reddit seems to agree with this list, and states the same, with the addition of a currently unknown multiplier:
I think it's pretty self explanatory on how to receive more premier balls. Basically, do as much damage as you can, your team has to do as much damage as they can, and try and do Raids in Gyms that are controlled by your team.