Playing an extra land ramps you, and these decks usually have high land counts
Soul Separator is a very weird card that Ive not yet found a good place for it, but I figure it might do good work here-if Etrata is dying, let it go to the graveyard where you can use Soul Separator to make a 1/1 Spirit Etrata token along with a 3/5 Zombie token
Both sides of this card are quite powerful, and together they ensure a laughably successful combat step
For example, a 2/2 Tender Wildguide Creature you can pay 2 in addition to your casting cost and create a 1/1 Tender Wildguide Token Creature
I dedicate half the trove to commons, and the other half to uncommon up to legendary, all sorted into their various rarities
Secondly, being aggressive with a commander like Jirina Kudro is a good way to punish players for clunky precon mana bases or inconsistent starts, both of which are issues for some of the other precon decks