On top of that, you may also want to include some creatures that ramp such as Solemn Simulacrum , Burnished Hart, Palladium Myr, etc
But maybe you dont play with [card]Necropotence[/card] every day
Mystical Tutor, Worldly Tutor, Sylvan Tutor, Personal Tutor, and Enlightened Tutor are all one-mana tutor options that can find specific types of cards
Even though most of these are (surprisingly) not assassins themselves, they synergise so well with the cards from the last section that Id consider them essential support cards
While some of these are banned, most of these are viable as commanders
Would you generally rather be the player at the table with zero cards in hand or the player with a full hand of seven cards