C · Positioning & configuration · §11
The slots with a real argument against them, and what testing would have to show.
Two maindeck is the most arguable inclusion. Against a deck whose threats are all units it takes nothing, and the information is worth less than a body would have been. It earns its place against spell and gear decks and is the first cut against anything else.
One is a four-Energy trick in a deck whose curve tops out at six, and its Flow cost is another four. It is two casts over a long game and dead weight in a short one.
buffs another friendly unit on play, which is a permanent +1 rather than a trick. In a deck that wants exactly one unit per battlefield, the buff has to travel to a body somewhere else, and that is a real constraint on when it is castable for value.