From his analysis it sounds like you really need to fill all three seats in at least one tank out of three. MAYBE a skillful commander can command three tanks if all his drivers are listening carefully, but I would not want to be in a tank without the 360* situational awareness. It's certainly worth trying five man teams in three tanks total to see if that's really sufficient, but given drivers can't see sideways, all tank crews are going to need very skilled commanders, constantly telling drivers not only where to find targets, but how to avoid driving into other tanks. This is a big deal. First thing I'd look for is a radar facing the driver. If there is one, this review didn't mention it.
I'd also note that given both the 30* angle and 1.8km range limitations of the main gun, defense against aerial strikes is limited to S3 missiles, which is 10 km. That means S4 or larger missiles, and S10 guns are required to kill these from outside their range. Anything that doesn't carry weapons this large is fair game. Something as small as a Cutty could kill 6 Novas from 15km with impunity, if it knew ahead of time to load up 6 S4 missiles. Consider the Cutty the premium Tonk Killer--our A-10. Since only S10 guns have this kind of range, it's going to be difficult for most ships to kill tanks safely. A fighter can come in and take its chances, but the notions of ships lazily hovering over a battlefield and ruling it are probably wrong. S3 missiles are going to stop that happening with most ships short of an Idris.
Really, to cope with both Tonks and Cutties with S3 missiles, you probably want a light fighter flying to evade the S3s. That will work, but certainly you're taking your chances against the missiles.