If your deck is artifact-heavy, then Trading Post is a great choice since you can sacrifice the copy to return an artifact card from your graveyard to your hand, and if the copy happens to be an artifact creature, you can sacrifice it to draw a card, which will let you go up on cards from the transaction
Constructed formats (Standard, Modern, Legacy, and Vintage)
These are great ramp pieces that also function as fixing
In commander, Elspeth most likely fits into superfriends archetypes where playing as many Magic: The Gathering planeswalkers as possible from War of the Spark or otherwise and using effects like Doubling Season and Atraxa, Praetors Voice to let them use their ultimate abilities early
Now, if the ink price is right, you can move your warriors to a variety of recognizable spots from the Disney stable, like Skull Rock or Treasure Planet's RLS Legacy