I don't work in a lot of low bandwidth environments, so generally the default policies seem to suffice these days for me. However I'm sure some others here will have thoughts. Here is an older thread on the subject: https://community.meraki.com/t5/Security-SD-WAN/QoS-for-Teams/m-p/102045#M25647
It's technically relating to MXs but many of the same ideas would apply
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