In my opinion, Scizor's CB set should be ranked much higher. With the ascent of fairies in the meta, it becomes way too valuable to leave aside. CB U-turn is almost a 2HKO on Mega Slowbro!
252+ Atk Choice Band Scizor U-turn vs. 252 HP / 84+ Def Mega Slowbro: 194-230 (49.2 - 58.3%) -- 98% chance to 2HKO
Anyway, scizor's CB set offers all sorts of advantages, such as being able to fire off priority nukes with technician that as priority attacks, are second to talonflame in power. On top of that, for predicting switches, it gets Superpower to stop Mag from trapping it by killing it on the switch (first turn only obv) and can also kill heatran on the switch.
It also gets really good coverage in pursuit and knock off, with pursuit being the best way to kill annoying psychics.
Scizor also has a great matchup against many common leads, like Garchomp (2HKOed), Terrakion (OHKOed), Mamo (OHKOed) and is the most reliable stop to mega diancie.