Please excuse me for a late reply, I pondered this question whilst doing other things.
Let us consider what the standard 5 CCV means. Given that Germans can get ATMM by standard rules, some British/US get Gammon Bombs by SSR, AE a -1 DRM and anybody can get MOL by SSR, I would consider 5 CCV to be infantry with little more than grenades, improvised charges or even lengths of steel to jam tracks, IE nothing specifically to deal with AFV. I would be disinclined to reduce CCV except in unusual cases, eg Ammo Shortage.
1 PAATC would be appropriate where a unit/nation was inclined to "Tank Panic". So the 1942 PA would seem to good candidates for a 1PAATC, if the historical accounts suggest that. Gebirgsjager? In most circumstances I would say no, they were fairly elite troops. There were instances where German troops panicked, like during the British 1940 Arras counter attack, but other than on occasions in '39/'40 or '45 Volkssturm I would be disinclined to subject them to a 1 PAATC. Mid war Luftwaffe Field Divisions might be candidates on occasion, they seem to have been quite fragile when faced by AFV. I see it as less being regularly used to facing tanks as having the training or doctrine (or not) in facing tanks with standard infantry weapons.