Ferrothorn: Change Protect for Gyro Ball. Then I think you'll have a good toxic-stalling tentacle lead monster. :)
Gallade: Since you have Conkeldurr, I thought that for the sake of variety, you should change it. I think that Jolteon would be a good replacement. It's moveset should be Thunderbolt/Charge Beam, Signal Beam, Shadow Ball, and Thunder Wave, with the Magnet to hold. If you want to keep Gallade, replace Safeguard with Brick Break for powerful STAB.
Lucario: Again, I think Metagross is a better Steel type, and Conkeldurr a better fighting type. I would replace it with Cofagrigus for stalling fun :) Give it the Lum Berry, and teach it Will-O-Wisp, Power Split, Night Shade, and Protect. The idea is that you use Power Split to take away a sweeper's power, and then use Will-O-Wisp to further lower their attack. You can stall away with Protect, or speed up the process with Night Shade. If you want to keep Lucario, then replace all of it's moves except for Close Combat for Earthquake, Bullet Punch, and Extremespeed.
Metagross: I would never change this guy. Since you have HG/SS or Pt, teach it Ice Punch from the move tutor and forget Hammer Arm.
Charizard: Replace Dragon Claw and Shadow Claw for Focus Blast and Dragon Pulse. Then this is a special monster.
Conkeldurr: Okay, I love this guy. Change the item to Leftovers, seeing as he won't get OHKO'ed. I think that you should replace Earthquake with Payback, but if you don't want to, then keep Earthquake.
I wish you many wins and I hope this helps!