Naw, "The Wild Heart" is the album when Stevie began her dependence on collaboraters (Sandy Stewart co-wrote the music tracks on 3 songs & Petty again wrote one, while Prince basically wrote the music track to Stand Back, which is essentially Little Red Corvette's chord progression with different lyrics & melody

) And even more co-writer dependence when RAL was released having only 3 sole Stevie penned songs. That was a shock for us fans who were wondering where the mad hatter prolific songwriter of Bella Donna had gone.
There was so much pressure after Bella Donna's blockbuster success with its string of hit singles to deliver more of the same, that Jimmy & Stevie turned more and more to outside writers (remember JI was always on the hunt for Stevie next big single, unsure if Stevie could deliver one unintentionally on her own. So Stevie definitely ramped up her coke use
after Bella Donna, not only to keep up her hectic schedule balancing FM (Mirage) & her exploding solo career going into the making The Wild Heart, not to mention she was already exhibiting obvious outward signs of abuse during the "Mirage" tour and in her person life by making wildly impulsive decisions like marrying Kim Anderson (Robin's widower).
So yeah, I'd agree that Mirage through Rock A Little, and I'd also throw in Tango In The Night were the "Cocaine Nicks" years. I add TITN only because the majority of her written or submitted material and her vocals were recorded before she went into rehab. (think "Seven Wonders" wild wicked vocals, again on display on WISYA and the outtakes & demos; "Joan Of Arc", "Juliet" & What Has Rock n'Roll Ever Done For You"

). The Klonopin started to rear its head subtly during some TITN promotional interviews & the "Shake The Cage" tour later, but it was much more evident on OSOTM and that tour - which was exacerbated when Stevie broke her foot in her pool @ a month before it kicked-off, which prolly led not only to a ramp up on her Klonopin, but pain medication or Tranquilizers as well.

Accordingly, her OSOTM tour has 2 distinctions. It the only tour Stevie absolutely has no recollection of... AT ALL

And the foot accident led to the 1st sighting of the Stevie in Frankenboks on stage.
