White’s strategy is very hard. It is founded on understanding the core game. Prolonging the game by life gaining. And surprise. White’s most powerful mechanic is the element of surprise. Most of the cards are built to put an opponent off guard, and to cause them to question their attacks, the most important part of the game. White will disrupt attack phases, being the weakest of the color wheel. It’s best set is lolling an opponent to feeling comfortable, and then hitting them with a surprise. White is a grandmaster’s choice for its purity. Great players can win with white because they don’t get caught up in playing games other than the one on the board. White has to play the game on the board, making it the weakest of the color wheel, but the strongest when in the hands of a grandmaster player. It is a sort of right of passage.
Red’s strategy is fast. Throw fast attacks, get damage done fast. It burns through those 20 life quicker than anything. Burn spells that deal damage. Little cheap creatures with haste that will deal immediate damage. There is no long term strategy with red. There is only the strategy of ending the game as quickly as possible. It relies more on the basic game mechanics than it does anything else. Blue happens to whip it, Black whips it, and it does average against white. Green has a hard time dealing with Red strategies. Red is probably the weakest color in the game mechanically, if not for its intense speed which makes it one of the strongest as well, when it can outpace other decks.
Blue’s strategy is to mirror an opponent. This makes it harder to play against White decks, which is where blue is at its weakest. Blue will control other creatures, it will make copies of other creatures,—its best weapon is the opponent it’s playing against. It makes a habit of taking what’s strong in another deck, and using it against them. On top of that, it has the strongest removal of all the color wheel, and that’s a counter. It will stifle an opponent’s seven drop instantly, for only three manna or less. If I had to estimate, blue would be the mid strongest color in the game, next to black which is the second.
Black’s strategy is to destroy. It’s on average the second strongest color, but it beats the strongest color handily. Green decks get destroyed by black decks because of deathtouch, wither, and removals. Green’s strategy is building up to a strong creature, and when that creature is killed, green does not work. And black has the most ways to kill creatures. Black is strong against white, too. It throws out the same amount of creatures, has a lot of protection, but all of black’s creatures are a little better for the price. Blue it loses too often because blue will throw black’s strengths back in their face. Black does like to lose life, which is the weakest mechanic in the game, but red gets creamed by black because black also has a heavy life gaining ability. Just about all of the colors are very weak against black except blue.
Green’s strategy is to overwhelm the opponent. It is the strongest color. Only because it utilizes the core mechanic of the game, does it much more efficiently, and can put out as many 1/1 creatures as it does 6/6s. It gets beat by white, coincidentally, and black. And it gets beat by red. And it gets beat by blue. But, the fact is it’s the strongest of the color wheel because while it gets beat by all of the other colors, sometimes even embarrassingly, it has the highest win probability at the same rate. Green is the fastest color for developing high impact creatures. And because of that, it’s the strongest strategy. It often never has manna issues, either. It’s just about the only color that can best every color handily when at its perfection, except black.