Mega Lucario is not banned in wifi, it is banned from Smogon OU. Based on the formatting of the post and the information provided, it would seem that this team is intended for use on WIFI and not Showdown, so Mega Lucario's ban in OU does not affect this team.
I want to give some advice on some of your suggestions. While removing the Salamence's (or Lucario's) Mega Stone is a good idea, Macho Brace is absolutely not the item to replace it with; in a competitive battle where EV growth is unaffected, all it will do is lower speed and become a liability.
I feel your suggestions lose much of their meaning when you fail to explain why they would be effective. You answer didn't explain why Future Sight would be a better option, and the suggestion as a whole seems ignorant of the strategy the asker appear to be going for, which is to burn the opponent then follow up with Hex for double damage. Future Sight, while having higher base power, gives the opponent plenty of time to predict and react and leaves Dusclops without a means of direct damage and without a STAB attack. I may have been able to see some benefit in your suggestion had you explained your reasoning behind it, but as it stands, it doesn't make a lot of sense.
Your suggestion for Electivire is fair, though be mindful that the purpose of offensive Pokemon is not to be able to tank hits but instead move hard and fast, so adding HP comes at the cost of Electivire's efficiency as an offensive Pokemon. Your final suggestion of Rampardos is lacking for the same reason as some of your others; you never touched upon why Rampardos is the best option for the team. I won't knock it until you explain it, but at present, the suggestion does not seem informed nor particularly credible.
I am sorry if this came across as rude to you, but I wanted to give some constructive criticism of your suggestions as they would be substantially more helpful if you explained them and detailed why they'd be most effective. I hope the feedback is helpful to you in some way.
