Completion Strategy:

In Simian Shootout, the game has you shooting a bunch of flying clay monkey's! ... with the automatic shotgun.
Because the monkey's are in the air, it's fairly hard to actually shoot them.
What I tend to do is run inside the actual mission, and make my way up to the 2nd level, and go under the bell.
I then shoot the monkeys from there.

Platinum/Fast Time Strategy:

IMO, Simian Shootout is one of the hardest platinums to get.
For my gay 3775 run, I stayed outside, and made sure I got the best of combos.
I know for a fact that at the start, the first 2 monkey's will come from the left, then from the right, and then 2 or 3 from the middle.
The order of monkeys after that is pretty random.
Just make sure you don't stuff up the 2 valuable combos that can be achieved in this level.

- Lenny