Newsflash, from this post

http://forums.startrekonline.com/sho...=263115&page=3
We see this:

"Having done some serious experimentation recently I have to conclude that my DPS dropped significantly when I swapped out to Dual Cannons away from the Dual Heavies.

The Static part of my escort build was

Fore: 1 Torp, 3 X

Aft: 3 Turrets

With 3 Dual Cannons I lost quite a bit of DPS during Rapid fire and Scatter Volley. And since I have one of each one is always up.

With 1 Dual Heavy Cannon and 2 Dual Cannons, my DPS was in still that bit lower than 3 Dual Heavies.

Now with 2 Dual Heavies and 1 Dual Cannons my DPS actually surpassed my 3 DHC build.

Now I didn't swap out anything but Cannons so energy type and boost consoles where still the same, so I'm going to make the assumption that it's the way the Energy drains that helps my DPS here."

Note his statement, that it was the drop in DPS of his Rapid Fire and Scatter Volley that resulted in his reduced DPS overall. The conclusion is that you want to find the best combination of weapons and comlementeray powers, not just plain weapon DPS without using powers.

It would appear that most people may see an increase in DPS, IF they are also using two or more cannon powers, by switching from 3 dual heavies to two and one regular dual.

However, I have thought of a possibility. I understand that the weapons used first are the ones to the left on your ship layout of fore and aft weapons, it may be that it might make a difference if you put that regular dual cannon to the left of the heavies or to the right, if it is true that the way they use power is what effects the DPS. It may also effect which cannon contribute the most to the powers, like Rapid Fire and Scatter, which suggests that putting the heavies to the left might work.

Also, earlier, two torp launchers were tried with one quad cannon and one regular cannon. It may be that the powers to go with the cannon and the way they use power do not go well together. A quad or regular dual and a regular dual heavy may work better. This however assums that two torp launchers are even optimal, it may be that with 3 purple DOF's you are already at max with just one.

Lastly, is the data on this site up to date ?

http://www.freemmoguides.com/star-tr...weapons-guide/
BTW, it agrees with the data above, saying that more than two dual heavies are not optimal,