Yup. This actually happened.

[Eul]

You need to meet all 3 stats, don't do it if you don't meet all 3, rank up missions aren't like regular missions.

It's weird if with that level the stat still not met requirements. 20 Tactic should go to mental imo.

[Welsper59]

It's weird if with that level the stat still not met requirements. 20 Tactic should go to mental imo.

You can't think of it as a complex system. It's not even like normal stats we see on gear, from what anyone can tell. The numbers you see for Squadrons are simply a "do you meet the requirements?" type of thing. If no, then you essentially lose 1/3 likelihood of success per stat that is not met. With rank up missions, just based on the text provided, you can only assume harsher penalties for not meeting the required stat. As in, either significantly lower odds (e.g. 30% success at most) or just outright impossible to succeed (i.e. 0% success chance). Any excess stats just won't matter, since the idea is that you have to adjust the bonus stats based on mission reqs.