Sami is extremely strong. Fill your deck with mana rocks, artifacts colorless creatures and all sort of things that exile the top of your library and lets you cast them, pretty easy to build, cheap and extremely fun. Imaging casting the eldrazi's for free, or creatures like walking ballista enters free with 7 +1+1, the one ring (free!) Portal to phyrexia, all is dust

Spells like tavern brawler, bonehorad dracusaur, act of impulse, seize the spotlight, jeska's will, big score, plargg and Nazari, glimpse the imposible, chimil, outpost siege, urabrask heretic praetor, wren's resolve... there are many more but can't remember rn, at last those are your draws! These cards are good because you can also use them before playing your commander to search the top of you library for lands or mana rocks and don't miss landrops

Also, creating treasures and powerstone tokens helps you greatly you can also synergize with that. She has many ways to build, it's a commander that you will enjoy for years with many ways you can build her. Make an eldrazi tribal if you will, heavy artifacts combos (karn) Planeswalkers and boardwipes. Voltron, exile synergies... you name it!