Defining circles, roles and stategies may take longer, may need more questions and a longer response time. Integrating relevant responses may take time as well.
Procrastination is an evil thing. It can steal your time even when you have minutes or seconds. Therefore I focus on minimizing question and answer time.
If you have a day to answer, you tend to use the whole day for thinking, if you have five hours, you tend to use all of it hours. But if you have only 60 seconds, surprisingly you are able to give almost the same quality answer or decision. The reason is that most of the time we already have our ready preferences, reasons and answers unconsciously.
To get fast access to these ready answers I usually give a 60 second timeframe when the answer is a list of words and a 120 minutes timeframe when I ask for a sentence.
About collaboration tools: I love to use a whiteboard when listing values, ideas. To prioritize I ask the circle members to stand up, grab a marker and mark the preferred words on the board. Post its are great as well. A snapshot of the whiteboard posted to a g+ community supports the participation of group members who join via hangouts or skype.