His offensive repertoire was most refined in the mid-'90s
His offensive was improved but his decline in defense was more pronounced. His assists went up because of the type of players he had as a supporting cast.
He was more efficient.
He was a marginally more efficient shooter from the field, not from the free throw line though.
His PER was highest from 1992-1995
PER doesn't measure defensive performance.
that's when he won his championships
That's also when Jordan was out of the league and he had his best supporting casts.
The first time he won the championship he was the only superstar on the team.
True, but he had a damn good supporting cast in Thorpe (near All-Star level PF), Maxwell, Smith, Horry, and Cassell. His teammates stepped it up big in those Finals against the Knicks and made it hell for their guards/wings.
You're wrong about this. There's more to the game than PER.