[quote=Archangel89]
Oh I understand that much...however would the heavy melee attack drain a great deal
[/quote]

Not as much, omni-tools are evidently very energy efficient, considering the amount of use they see in the series, and if you do things right, you can basically power spam to infinity and there's not much of a delay between various heavy melee attacks.

However, don't really think of it in terms of a game. Going into this, try to think of it more like one of the novels than the games. The moment you start worrying about cooldowns between powers and weights and blah blah blah is when you start shooting yourself in the foot. If I was really worried about equipment and power templates and use in terms of damage values and so on, I'd probably just play the game instead of writing a story based out of that universe. :P