They already have a low house edge. Pass and Come bets carry a house edge and, with Odds, this is lowered to Don't Pass and Don't Come bets.
The best bet on a dice table, where the game bars (pushes/ties) either the two or the twelve When you say "best" betting strategies, I assume you mean lowest house edge. By this definition, you . This is a strategy I use, but be forewarned it's advanced and there's a LOT of stuff going on at once. You should only use this.
And of course we've got stuff both for beginners with craps and advanced See our List of All Bets to find out the house edge for every bet on the craps layout. My Craps Game Winning Lesson 3 - Come Bets