LA looked to be on to something in 1990-91, when they shocked a lot of people by winning the Smythe Division. But they showed cracks against Vancouver (the Canucks led the series 2-1 at one point), and nobody was surprised when the Oilers beat the Kings in the second round.
The Kings acquired Kurri's rights from the Oilers in the summer of 1991 (Kurri spent the 90-91 season overseas) and expected that to put them over the top. It didn't. The Kings regressed. And they were eliminated by the Oilers, again.
1992-93 was a funny year for LA. They had a terrific start, despite Wayne's absence. The WOW line (Without Wayne) of Robitaille-Kurri-Sandstrom was excellent. But Sandstrom ran into his usual injury problems, Kurri's production tailed off, and Hrudey slumped mightily, to the point that he expected to be sent to the minors. Gretzky's mid-season return didn't change anything. Coffey was traded, and the returns did little to improve the team.
For whatever reason, something clicked in the playoffs. Melrose came off looking like a genius. Hrudey played some of the best hockey of his life. Gretzky probably played the best hockey of his post-Oiler days. McSorley played the best hockey of his career. And while the returns from the Coffey trade did little (other than Gary Shuchuk scoring a critical 2OT winner vs. Vancouver in Game 5), Coffey's absence enabled Blake, Zhitnik and Sydor to take on greater roles. All three responded. Especially Zhitnik. The forwards, with the exception of Robitaille (who was benched a couple times in the playoffs) and Jimmy Carson (a healthy scratch) all did their job. Their 93 Cup run wasn't a fluke.
Would they have won the Cup without the illegal stick call? Who knows. Maybe the Habs score the tying goal in Game 2 anyways. And the Kings actually responded well the next two games, losing both in OT. LA had a real shot of going back to Montreal with a 3-1 lead, despite McSorley's illegal stick.
Should the Kings have won a Cup? I don't think so. Their best shots were in 1991 and 1993. They wilted in 1991. And I don't think anyone was going to beat Roy in 1993. Best goaltending display I've ever seen, after the first two games in Quebec.
Did Montreal get help from Buffalo and the Islanders in 1993? Yeah. But Buffalo was a bigger threat to Montreal than Boston. Boston was a one-line team in 1993: Juneau-Oates-Neely. That's it. Guy Carbonneau would have shut Oates down with the way Carbo played in 1993. Buffalo had a couple of good scoring lines that year. Pittsburgh looked invincible in the regular season, but even against New Jersey in the first round, they didn't look unstoppable. And Lemieux's back was really bothering him in the 1993 playoffs.
Nobody was going to beat Roy in 1993.