Adjusting the spacing in a card layout

Hello all! I’ve started working on a new, single player card battler horror RPG called Deck of Darkness: Diabolical Dungeons of Doom. I am trying to make it so that cards are centered and moved properly when a card is removed from play. The cards on the left are the hero cards, the others are enemies so I want to keep a slightly larger gap between the two groups. The screen below is for an example of the spacing.

Would I be best using the grid extension in the game or to manually have cards move a specific amount when another is taken away?