1/10
It's 4-0 in particular that really seals up the minimum ranking for me. It's fucking baffling that they have to straight up just have Klavier say you can't present the non-forged evidence and that's that. Phoenix can't even be like, "So here's this evidence that some little girl just gave me out of nowhere. Please put it under the highest forensic scrutiny possible." He just goes along with it as if he obtained that evidence completely normally.
Also both AAI games take place before 4-0 so canonically this is the last time we have seen Gumshoe. What a fucking waste.
As for the rest of 4-4 I don't have much to add that hasn't been said. It would probably be more like a 4 for me though.
Also it's time to post this in case anyone hasn't seen it, but parody aside it really does put into perspective how bafflingly batshit Zak really is:
Edit: It's multiple panels and the embed is terrible, so best to actually open it in a new tab.
https://imgur.com/a/8QVtO
"One toot on this whistle will take you to a far away land."
-Toad, SMB3