Mass shootings that differ from "typical" attacks

These days, mass shootings don't attract the same buzz that they used to; Harper-Mercer's attack garnered relatively little media coverage, despite having a modest 9 dead and 9 injured. The guy was a biracial, IRA loving, loveshy who allegedly targeted Christians, the media should have swarmed to the case like vultures to a cadaver! The sad truth is, if up and coming mass shooters want to make headlines, they'll have to mix things up; shooting people at random in a classroom and then committing suicide is so passe. Heres a massacre that really shows some creativity:

"The St. Pius X High School shooting was a school shooting that occurred on October 27, 1975 at St. Pius X High School in Ottawa, Ontario, Canada. The gunman, Robert Poulin, an 18-year-old St. Pius student, opened fire on his classmates with a shotgun, killing one and wounding five before killing himself.[1][2] Poulin had raped and stabbed 17-year-old Kim Rabot to death prior to the incident."

This shooting, in addition to being one of the first "modern" school attacks, is interesting for a couple of reasons: Sexual assault in conjunction with a rampage attack is fairly unique; Duane Morrison and Zane Floyd are the only other rampage killers I know off that had done so. Poulin also attempted to burn his family's house down before embarking on his massacre, which while more common (being done by that Zawahri guy and probably a few others) is still somewhat of a difference in "typical" rampage attacks.
What are some shootings you know off that are different from your typical, "shot people at random then blow your brains out", killing spree?

Here are some mass killings with unique elements.

[You must be registered and logged in to see this link.]
Willi Seifert perpetrated a mass killing at an elementary school in 1964. He brought no guns and instead used a flame thrower, lance and a homemade mace to kill 11 people. Then he tried to kill himself by swallowing insecticide.

[You must be registered and logged in to see this link.]
A week after his divorce was finalized, Bruce Pardo knocked on his former in-laws' door during a Christmas party. He was wearing a Santa suit and carrying a gift-wrapped package containing a homemade flamethrower, as well as 4 9mm handguns. He indiscriminately shot at guests and then set the home on fire, killing a total of 9 people, before he fled the house and shot himself.

[You must be registered and logged in to see this link.]
A school massacre in Poland perpetrated by at least two 8th graders back in 1925. When one student was told he had failed the final exam, he began shooting at teachers. He then dropped a grenade and accidentally killed himself. Subsequently, a second student who failed the exam began shooting teachers and students before throwing a grenade that failed to explode and then committing suicide. Because they used military grade weapons, there was speculation that Soviet agents had been involved.

[You must be registered and logged in to see this link.]
He had the highest number of casualties in any mass shooting in the world, for nearly 30 years, until Breivik in 2011. He was a police officer who went on a several hour rampage, killing over 50 people after his girlfriend woke him up while swatting a fly off of his chest. He shot at people and used grenades before taking several people hostage in a farm house. Then he blew himself and several hostages up by detonating two grenades.

[You must be registered and logged in to see this link.]
Wade Frankum perpetrated a massacre at a mall which was fairly typical but he began by spontaneously pulling out a knife and stabbing a teenage girl who was sitting near him in a cafe. Then he shot several people and fled to the parking lot where he got into a woman's car and demanded that she take him to a nearby town. When he heard police approach, he apologized to her, exited the car, knelt down on the ground and shot himself in the head.

[You must be registered and logged in to see this link.]
George Sodini wrote online about his women troubles just like Elliot Rodger. It was also a pretty typical shooting but two unique elements stand out to me. There was a previous incident, about a week before the shooting, where he brought a grenade onto a bus and was questioned about it by the police. Secondly, he turned out the lights before he started the shooting which I have never heard of before.

And if you want a really unique mass killing
[You must be registered and logged in to see this link.]
In 1764, four Lenape American Indians entered a schoolhouse. The schoolmaster, Enoch Brown pled for the lives of the children but he was shot and scalped. The Indians then tomahawked and scalped 11 children, and only two survived. They also took four children as prisoners.

Campo Elías Delgado is also interesting and, in my opinion, unique for the following reasons:
-High kill count with just a revolver and knife.
-Shot up fancy restaurant, unlike most restaurant shooters like the Luby's shooting and James Huberty.
-Some killed using an Uzi, which means some were probably accidentally killed by police. I've never seen this happen in any other shooting.
-Despite him getting shot by police, some people still seem to not know if he commit suicide or was shot by police. The only other time this happened that I can think of is Matthew Murray's shootings at a YWAM center and a church, where someone shot at him and he died. Some say he commit suicide, others say he was shot dead.
I wonder what Campo's actual kill count was. What I mean is, how many people were killed by the revolver in the restaurant?

Randy Stair, for obvious reasons.