you might try grouping them into functional categories: tonic, sub dom and dom. I iii and vi = tonics, ii and IV are sub dom, and V and vii dim are dom.

So, Ionian, Phrygian, and Aeolian are related
Dorian and Lydian are functionall related

and Mix. and Locrian are related

Or you could think of them in terms of proximity:

Lydian is just an Ionian with an aug 4th degree.

There are a lot of ways to go about this, whatever works is the right way for you

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