Looking for advice on what could be replaced, removed as well as utility land ideas? I'm set in stone with Tiamat as Commander due to being able to fetch multiple Dragon's at once, but if there's a better Commander for that role then I'm all for it, as well as perhaps quicker ramping ideas since I play 100 hp in my pod. I usually end up getting to 60 hp before my battlefield gets a little insane. I'm not an expert on cards but could definitely use pointers.

Edit: I've also found miirym and the ur Dragon to be too good of a combo to have due to the idea of the deck to be getting as many Dragon's out as possible.

[COMMANDER] 1 Tiamat

[CREATURES] 1 Adult Gold Dragon 1 Archetype of Endurance 1 Balefire Dragon 1 Bladewing the Risen 1 Brainstealer Dragon 1 Cavern-Hoard Dragon 1 Crystal Dragon // Rob the Hoard 1 Decadent Dragon // Expensive Taste 1 Dragon Turtle 1 Dragon's Disciple 1 Earthquake Dragon 1 Goldspan Dragon 1 Hoard-Smelter Dragon 1 Hypersonic Dragon 1 Korlessa, Scale Singer 1 Miirym, Sentinel Wyrm 1 Necromaster Dragon 1 Orator of Ojutai 1 Rapacious Dragon 1 Rivaz of the Claw 1 Ryusei, the Falling Star 1 Silumgar, the Drifting Death 1 Terror of the Peaks 1 The Ur-Dragon 1 Wardscale Dragon

[ARTIFACTS] 1 Arcane Signet 1 Bootleggers' Stash 1 Dragon Arch 1 Dragon's Claw 1 Dragon's Hoard 1 Jade Orb of Dragonkind 1 Magistrate's Scepter 1 The Magic Mirror

[INSTANTS] 1 Bane's Contingency 1 Defabricate 1 Devious Cover-Up 1 Dragon's Presence 1 Essence Capture 1 Heartless Act 1 Lofty Denial 1 Revivify 1 Unexpected Fangs

[SORCERIES] 1 Crux of Fate 1 Fearsome Awakening 1 Glimpse the Core 1 Trash for Treasure 1 Unfinished Business

[ENCHANTMENTS] 1 Alpha Authority 1 Dragon Cultist 1 Dragon Shadow 1 Dragon Tempest 1 Leyline of the Void

[LANDS] 1 Contaminated Aquifer 1 Evolving Wilds 1 Fabled Passage 6 Forest 5 Island 1 Ketria Triome 1 Molten Tributary 7 Mountain 1 Mystic Sanctuary 8 Plains 1 Sacred Peaks 1 Secluded Courtyard 1 Sunlit Marsh 6 Swamp 1 Tangled Islet 1 Temple of the Dragon Queen 1 Terramorphic Expanse 1 Treasure Vault 1 Wooded Ridgeline 1 Zagoth Triome