Echo essentially asks you to skip a turn, but Vanishing 3 gives you plenty of time to make use of a card, and it's an easy downside to work around too.
If there are specific cards or combinations of cards that your deck is built around, drawing more cards will help you find those key pieces faster

March of the Machine Details Preorder Now March of the Machine Set Code : MOM March of the Machine Commander Set Code : MOC March of the Machine Multiverse Legends Set Code : MUL Tabletop Legality (New-to- Magic Cards) : March of the Machine (MOM): Standard, Pioneer, Modern, Legacy, Vintage, and Commander March of the Machine Commander (MOC): Legacy, Vintage, and Commander March of the Machine Multiverse Legends (MUL): Individual cards may be used for the respective formats in which they are legal MTG Arena Legality : March of the Machine (MOM): Standard, Explorer, Alchemy, and Historic March of the Machine Commander (MOC): Not available on MTG Arena March of the Machine Multiverse Legends (MUL): Historic plus individual cards may be used for the respective formats in which they are legal Website : March of the Machine March of the Machine Important Dates : March of the Machine Story : Available now

Legendary Creature - Wizard Elder Estinien Varlineau Whenever you cast a noncreature spell, put a +1/+1 counter on Estinien Varlineau
If you are collecting, look at Collector Boosters from FINAL FANTASY, Lorwyn Eclipsed, Secrets of Strixhaven or Marvel Super Heroes