3/2 Split RNG Route M10 can in theory go toe-to-toe with a Panther as long as it pens every hit + never misfire and dodge a couple shots. Occurred once during this session so that'll never happen.
3 Tanks for axis base is giga risky as they'll be pretty low from the two other panther engagements, they have to healthy enough to take that engagement the next panther engagement, both which have Pz4 support.
The garrisoned building in the axis HQ can occasionally house an infantry squad with PzShreck, it's pretty much a reset angle if that occurs.
An alternative setup is going 4/1 with the M10 soloing a Panther with Riflemen sticky support. The problems are listed above - I'm not sure even with riflemen stickies can a M10 solo a Panther, more testing is required.
Major blunder probably at around 4:30 where I had all three tanks just sitting there front hitting a Panther. The vet 2 M10 was probably fine because of the 50% pen at vet 2 but the other two are sus.