How do you feel about the rest of theorycrafting

Some people are going to try to min/max everything because they find efficiency fun. But the intent of Flex is to offer a low stress option for guilds and friends to progress through content without rigid requirements to show up/sit out to maintain a number of participants. Similarly we like that people can PUG it and find some success in a managed group setting. Feel free to ignore the intent of the feature, but my response is still going to wow po be that limiting yourself to some specific number of people is not required to have a successful run, and can be detrimental to the types of people and raid groups that the feature is directly intended for.

If a raid leader is attempting to build a rigid group to attempt Flex and is telling members of his own 25 Normal team to sit out because some lower number is optimal, that person is overthinking it. If someone is building a Flex PUG and is turning down skilled and geared players because of an optimal number he read somewhere, he's overthinking it. It's Flex, let's not pretend you're world first raiding here.