I linked to this deck in response to your comment here:
https://deckstats.net/decks/64080/549666-b-w-planes-controlI wanted to
reiterate that there are multiple uses for more than one copy of each card in a deck, multiple copies of fewer cards allows you to remain consistent in what you **want** to draw each turn and allows you to be consistent in the power of each play as well.
Some cards that may share some of the same effects may be stronger than the other, consolidate your gameplan to fewer x4 cards and even fewer x3, x2, and esp. x1 copies in relation to what you rely to be drawn to make the best plays when you most need it.
Also there is a non-zero reason(yes even for the pros, and even for you) to have more than 60 cards in a maindeck. It also goes back to statistics and what you are looking to draw on each turn, and especially your starting hand.