I think increase Brummbar rear armor should be fine.
T34-76 are unreliable.
Su-85 pen already reflect with panther acc buff.
the point is we need fairer justification for brumbar nerf
is it because of its high armor, drive it and kill infantry?
then that standards need to apply to similar allies heavy AI.
same thing with ripping off the arms of Ostt and VSL.
If they can overwhelmed early 1v1 non-doc units,
then that standards need to look into allies callin infantry and non-doc infantry vet bonus, as they can overwhelm late games in 2v2 and bigger game modes.