You could pick off just one character with 2 Willpower, or ping damage onto two and finish them off with another character or ability
In truth, there's more to it than that
Amber - Stefen Delgado Amethyst - Garrett Farrington Emerald - Dan Eckstein Ruby - Dan Eckstein Steel - Stefen Delgado This card screams "value!" On turn two you not only get to ink a second card, so that by turn three you can go up to 4 ink, but this card also replaces itself and allows you to draw
Usually, -1/-1 counters are for killing opponents stuff
All of these questions should factor into your decision, and luckily youre not alone in trying to figure all that out
If you've completed a Dungeon, youll be able to bring a creature back to the battlefield