You are much better off moving your point forward in a direction where, if it misses your intended target, it continues into other target. For instance, an attack to the arm that, if it misses, tracks off into the air is not as good as one that continues up the arm and may hit higher up. Attacks may consistently fail against a good defender or counterattacker - if you don't feel comfortable moving to another strategy, try changing your rhythm, or try feinting an attack, dealing with their response, and then hitting them. Fleche attacks can be effective if unexpected, but usually need to hit immediately - a fleche attack carried to a second or third step requires fast handwork from a fairly awkward position to keep you from being hit. You should also actively practice how to deal with a fleche attack that is unsuccessful.
Footwork is critical to any epee strategy.
For attackers, forward controlled speed is very important. You want to land in a position to deal with an unsuccessful attack. Don't overlunge, leaving yourself off balance and often your hand low. Be balanced enough that, if your point is near target and you are not in immediate danger of being hit yourself, you can continue to move in. Be ready to get out as well, or continue in if that is advantageous.