Strategy on your Opponent

When dueling, you must have strategy on your opponent. If you don't, your chances of losing increase. Lets say your opponent uses a Darkworld deck and you use a Elemetal Hero deck. Your opponents strategy is probably to get Grapha, Dragon Lord of the Dark World out in the field. He already has Grapha in the grave and is ready to summon him on his next turn. You have polymerization, Elemental hero Burstinatrix, Elemental hero Avian, Elemental hero Bubbleman, and Elemental hero Clayman in your hand. You choose to fusion summon Elemental hero Flame Wingman because you think he looks cool instead of Elemental hero Electrum that could beat the opponents Grapha. This would be an example of bad strategy on your opponent because on the next turn your Wingman would be defeated. To sum this all up, use common sense when you are dueling and be ready to counter your opponents moves that will likely happen.