Enneagram vs socionics type - specific example

[The Exception]

I'm pretty sure some type combos aren't possible. Like XXFx E5 makes no sense, nor do XXTx E2/E4 or IXXx E7. I'm also not convinced IXXx 8s can be a thing.

They may be rare but I don't think they're impossible. Of the above you've mentioned, I know an INFp E5, an INTp E4, and an ISFp E7.

Watch out, people, I'm divergent!