User blog comment:RiverToRue/Newish(?) Player here! Deck building advice and some general questions/@comment-24965906-20140925203430

The normal Ratio I've seen people run is 25- Monsters, 3- Impacts, 6- Weapons, 18 - Spells. This changes with certain decks, like Danger World decks running 8 weapons, especially i based on the A monsters, or Katana World running 6 Impacts due to Lethal Formation, Magic running alot more spells etc. It all depends on the deck.

Running three of cards works as consistently as running 4 imo. This gives an extra card space for other cards. Only run 4 if that's card's REALLY important, like the Buddy.

The Minimum of overall deck size is  52, but in my experience, up to 55 can still work and be as consistent, so don't be stressed if you go over a bit.

The best thing is to buy a Trial Deck, then expand. I know it might not be the easiest thing, and some world's don't have TDs, but that's the way it has to be.

Again, as you play, you adjust to suit. You'll find the Ratio that works for you and your Deck. Just keep at it.