I don't see how Pershing + Jackson would be OP.. I mean, first we would have receive Pershing. Then it depends if it would be generalist or more like Panther. If generalist, how powerful? It should be worse than Tiger and better than Panther vs infantry, in my opinion.
But let's stick to the topic...
Tiger + Stugs
King Tiger + Jadgpanzer
Panther + Jadgtiger
IS2 + SU85
IS2 + T34/85
In 2v2 there are more powerful combinations like:
King Tiger + Elephnat
Tiger + Jadgtiger
Tiger + Elephnat
Brummbar + Elephant
King Tiger + Jadgtiger (gardening insane)
IS2 + Jackson (which would be definetly better than M26+M36)
IS2 + ISU
So... I hardly see how Pershing + Jackson would be OP, especially if Pershing doctrine would lack of any off map, which means pak43 all day long.
