Would it be better to fire one star quickly or fire several at a much slower rate of fire?
It’s hard to say this early into the season what the best strategy is. We will have to wait for a few tournaments to happen and for both designs to be prototyped to be able to say which one is better. Right now I’m saying one star quickly is better, though 
Honestly, it depends…
If you are wanting to drain the stars as fast as you can:
Use a fast shooter that could hold one star
If you are wanting to wait near end to make sure nobody shoots back at you:
Use a slow shooter that could hold multiple stars
Depending on your strategy depends on what you should pick…