Take a look at cards like Anim Pakal, Thousandth Moon and Urabrasks Forge for some consistent engines to use with him
What attacks does Lucario ex have

Abolisher of Bloodlines Adanto, the First Fort Ashling, Rekindled Ashling, Rimebound Assimilate Essence Atzal, Cave of Eternity Avacyn, the Purifier Awoken Horror Azcanta, the Sunken Ruin Barracks of the Thousand Black Chocobo Blight Titan Blighted Burgeoning Blightsower Thallid Bloated Processor Brigid, Clachan's Heart Brimaz, Blight of Oreskos Brutal Cathar Chrome Host Seedshark Compleated Conjurer Compleated Huntmaster Conqueror's Foothold Converter Beast Corruption of Towashi Cult of the Waxing Moon Curse of Leeches Deadly Dancer Demon-Possessed Witch Elvish Vatkeeper Essence of Orthodoxy Excise the Imperfect Eyes of Gitaxias Furnace Gremlin Geode Grotto Gift of Compleation Glissa, Herald of Predation Glistening Dawn Gold-Forge Garrison Grub, Storied Matriarch Hideous Fleshwheeler Huntmaster of the Fells Ichor Drinker Infected Defector Injector Crocodile Itlimoc, Cradle of the Sun Jurassic Park Lost Vale Lunarch Inquisitors Malady Invoker Marauding Dreadship Merciless Repurposing Metzali, Tower of Triumph Mycoid Maze Neglected Heirloom Norn's Inquisitor Olag, Ludevic's Hubris Phyrexian Awakening Primal Wellspring Progenitor Exarch Ravager of the Fells Revealing Eye Sanctum of the Sun Sculpted Perfection Searing Barb Sephiroth, One-Winged Angel Shadows' Lair Shinryu, Transcendent Rival Skyclave Invader Spires of Orazca Spitfire Bastion Sunder the Gateway Sunfall

Weve talked a lot about this in the past, and it is one of the most controversial things in all of MTG
It takes a few turns for the tutor to come into effect, but it hits all those best artifacts listed with Trinket Mage, and even puts them into play
Man of Measure gets no bonus