Maybe youre a big Final Fantasy VI fan and you want to keep this deck on brand, or you and your friends all bought different precons and want to keep them at an equal power level
Although the only card that can traditionally be sacrificed is Solemn Simulacrum , Ashad gives your nonlegendary artifact spells casualty two, which means they can be copied by sacrificing a creature(s) with two or more power
This deck gives up creatures for artifacts that function as elementals, which means targeted removal can risk you overcommitting to elementals, only to be left trashless at just the wrong moment (yes, having no trash is a bad thing)
So, Id fix that need
Delirium - As long as there are four or more card types among cards in your graveyard, each opponent's maximum hand size is equal to seven minus the number of those card types
Ral Zarek is most comparable to Ajani Vengeant, who is arguably the third best planeswalker ever after Jace, the Mind Sculptor and Elspeth, Knight-Errant