I disagree with the whole Ferrothorn-Lucario situation. It's just like Landorus-I VS almost anything, the penalties of them staying in is too great to outweigh the benefits of using thunder wave, as if they mispredict, they lose a counter to Kingdra, whereas if they predict right, Lucario still gets to hit something with a +2 CC. It isn't 50-50 is what I'm getting at.
Edit: Also, Power Whip and Gyro ball both do under 45% to Lucario, and it can easily wreck stuff at +2, as, hopefully, it won't take more damage, and it still has 6 turns of LO recoil left.
0 Atk Ferrothorn Gyro Ball (150 BP) vs. 4 HP / 0 Def Lucario: 102-121 (36.17 - 42.9%) -- guaranteed 3HKO
0 Atk Ferrothorn Power Whip vs. 4 HP / 0 Def Lucario: 82-97 (29.07 - 34.39%) -- 5.37% chance to 3HKO