Thunderus's charge could be replaced with a lot of different moves like just direct attacks like dark pulse or hammer arm depending on what you think you need more coverage for your team.
Landorus's fissure should definitely be replaced and sandstorm too or you will end up damaging the rest of your team. I am a fan of Outrage myself but you might want to have a perism berry if you are to go with that, but I can't think of a move to replace sandstorm but it has to go regardless of sand force.
Lucario has plenty of good moves at its disposal. Dragon pulse, Aura sphere, Dark pulse or a good hidden power can be great moves for a lucario. Nasty plot is also good if you are to have 2 special moves so if you replace close combat with aura sphere and choose another one of the moves I listed it could be great in the move set.