The Skarner reworks fuck up his scalings every time. There was a first rework but that was so bad that I wish it didn't exist. He used to deal a ton of DPS with his Q and autos. Now they made him more reliant on burst damage.
The real rework reduced his bases on Q and E but moved it to his ultimate which was mainly used for CC instead of a nuke. They also made it so he can't stack attack speed and have high shield uptime. The stun was neat though a bit time consuming. Maxing out your ultimate damage was nice but when you build a lot of attack speed you can accidentally proc your passive removing the stack and preventing the massive ultimate nuke.
The next rework made the stun better but they screwed up his scalings on his spells so badly. The W %HP scaling was good and it made a good one point wonder. But the complete removal of his Q bases made it feel so bad to level it first while E wasn't much better to max first. His ultimate damage base went down but got an insane AD ratio but that got nerfed. Let's not forget how bad his spires were. Spires revealing yourself if you capture one for great stat boosts. Without them he feels so bad and useless.
I want a Skarner that should focus on building attack speed instead of being more AD reliant. Old old Skarner had a passive reducing all of his spells by a full second per auto on an enemy champion. He would maintain high uptime on his W which also gave attack speed. Kiting Skarner would greatly reduce his tankyness and be relevant as he only had a decent base movement speed and a 20% movement speed boost. Though this Skarner had a really shitty E that no one would even rank because how bad it was. A 2nd point in W gave you so much more than a point in E.