I have some thoughts on the screener. First, the word "screener" seems to go against a lot of what you seem to care about. Maybe reframe it a bit as "is this opportunity for you?" rather than "will we select you?"
Also, a screener is usually brief. Can you make a list of yes/no questions to use as a first screen?
You have a lot of questions! Some thoughts: Try a simpler approach, give a word count range, have an AI policy.