What are the best strategies for building a competitive deck in MTG Mud format?

To build a competitive deck in MTG Mud format, focus on including powerful artifact creatures and spells that can quickly ramp up your mana production. Utilize cards that can disrupt your opponent's strategy and protect your own creatures. Additionally, consider including cards that can generate card advantage and provide flexibility in different game situations. Lastly, playtest your deck extensively to fine-tune its performance and make necessary adjustments.