I have no serious complaints about this deck
Mechtitan Core You can play Mechtitan Core with Thopter tokens or other things that you dont mind exiling, but the strength of the card is in bringing the other artifact creatures and/or Vehicles back onto the battlefield so you can have the tasty triggers
Cheap legendary creatures, like Skrelv, Defector Mite and Lotho, Corrupt Shirriff are also great for this
For Competitive EDH Merciless Rage with Anje Falkenrath at the helm feels like the most easily adapted to a wicked competitive deck
Searches and fetches become useless with mills from Ashiok, Dream Render. Meanwhile, while Narset, Parter of Veils and Spirit of the Labyrinth locks card-draw limit for all parties
Rankle's Prank This is our second time seeing Ranke (third if you count Rankle and Torbran), and the mischievous faerie looks about like usual