I use packs and panther in 2v2. 2 AT guns is a decent place to be vs such composition. Some people like panther dives, but I think this is not the unit to gamble with, especially if you do that with more then 1, since you are often rushing into territory full of mainline infantry and mines.
Stug is nice, but a niche unit. You still can spam it and get value out of it, since it is much cheaper fuelwise then regular TD. JPIV is much better at killing TDs.
I've tried, they get rekt.
let me guess, by rocket arty and machineguns?