-Nature Power (becomes Tri Attack)
-Ancient Power
-Freeze Dry/Thunderbolt
-Encore
Nature: Modest
EVs: 252 HP/4 Def/252 SDef
Item: Life Orb/Leftovers
You messed up the EV's bro! Smogon says they should be 252 HP / 252 SpA / 4 SpD. You copied everything else exactly right though, so I won't hold it against you :) Just don't let it happen again!
Anyway, firstly - YOU ARE LUCARIO WEAK! Also, Talonflame pretty much wrecks you after an SD. Like, totz brah.
For starters, you want Magnet Pull on Magnezone. Kanga doesn't want to have to play mind games with Aegislash, while freeing it from Ferrothorn is a massive bonus. Timid + 244 Spe + Choice Scarf will outspeed Max speed Jolly/Timid Mega Lucario:
252 SpA Magnezone Hidden Power Fire vs. 4 HP / 0 SpD Mega Lucario: 176-208 (62.4 - 73.7%) -- guaranteed 2HKO
After the CC drop:
252 SpA Magnezone Hidden Power Fire vs. -1 4 HP / 0 SpD Mega Lucario: 264-312 (93.6 - 110.6%) -- 62.5% chance to OHKO
So basically, after SR it's a OHKO. Note that with Choice Specs you will always OHKO, however you are handedly outsped and KO'd before you can do anything. You lose the ability to OHKO Ferrothorn, however it really can't do anything to you in return. Scarf makes Aegislash troublesome if you can't play around King's Shield. Specs is required to OHKO 244 SpD Mega Scizor; for regular Scizor it doesn't matter. Basically you just need to weigh up your options regarding what you want to accomplish.
Note: You cannot trap Aegislash with Magnet Pull, however its usefulness outside of this still gives it advantage > Sturdy.
Crobat REALLY wants Roost. More-so, as your defogger it will be switching into SR, meaning it's taking 25% minimum just to remove rocks. If you want to keep it, then Roost needs to go > Cross Poison. However, there is another U-turn defogger that ISN'T weak to rocks, and is far bulkier:
Scizor @ Leftovers
Impish
248 HP / 152 Atk / 60 Def / 48 Spe
U-turn
Bullet Punch
Defog
Roost
60 Def means Mamoswine can only ever 3HKO with EQ after leftovers. 48 Spe lets you outspeed the normal 84 Spe Magnezone, which lets you U-turn out of its Magnet Pull before it can KO you. The rest is pumped into HP and Atk so you can still hit hard, while gaining as much as possible from Leftovers + Roost.
Aurorus really isn't worth it. Whatever bulk it has is rendered useless by its terrible defensive typing. To help mitigate your Talonflame problem, while keeping potential sweeping power, may I suggest Zygarde?
Zygarde @ Leftovers / Chesto Berry
Impish
252 HP / 48 Atk / 208 Def
Aura Break
Coil / Rest
Extremespeed
Earthquake
Dragon Tail
This thing is bulky AF for what it wants to do. 48 Atk guarantees a 2HKO on Shield-Forme Aegislash before a Coil. After a Coil, this will OHKO Mega Lucario, and conversely:
+2 252+ Atk Adaptability Mega Lucario Close Combat vs. +1 252 HP / 208+ Def Zygarde: 272-320 (64.7 - 76.1%) -- guaranteed 2HKO after Leftovers recovery
Extremespeed bypasses Talonflame's Gale Wings priority, while only ever being 4HKO'd by Brave Bird. Dragon Tail also helps to phaze things like opposing Mega Kanga, who can only ever 2HKO Zygarde with +2 Adamant Return. Choice Band Adamant Chomp only 2HKO's with Dragon Claw, while +2 Chomp OHKO's only ~30% of the time. Zygarde also combines well with Scizor, with Zygarde resisting Fire and Scizor taking Fairy and Dragon attacks.
Smeargle really is gimmicky. I'll take your word that it works for you, but I feel like it's a slot that's wasted if you don't get the exact conditions working in your favour. If you want to run Trick Room, then I'd suggest something with some special bulk that can also take Dragon attacks aimed at Zygarde and Fighting attacks at Kanga. For that, either
Mr. Mime or
Gardevoir. While both have 'decent' base speed (90 and 80 respectively), this makes them serviceable both in and out of Trick Room. They also pair excellently with Scizor, who is immune to Poison and resists Steel. Mr Mime has base 120 SpD and base 100 SpA that often goes unnoticed. I don't have time to come up with a set atm, but I'm sure you can dwell on it if you're interested.
Otherwise,
Slowking can be an efficient user that pairs well with Zygarde, taking its Ice attacks, and Fire attacks directed at Scizor.
Hope I've helped at least somewhat. Good luck!