Gev, build recommendations

So I've mostly stayed away from cEDH mainly due to no commander really speaking to me.

As a casual player I saw Gev and was like "my favourite colour combo and lizards".

I very quickly realised that he just kinda becomes a super quick high power kill deck in casual, turn 3 on a budget consistently is insane.

So looking around online he seems to been noted as "just worse ob" now that's pretty irrelevant to me as with my play groups cEDH we aren't caring for only the best in the meta deck.

The issue I'm having is I just don't know where to start for him as a cEDH commander, I just don't know the format well.

So I'm looking for any recommendations for how to build him, what cards and maybe example deck lists.