I personally think of a Conquest as half missile ship. A broad side is 2 large ballistic, 2 medium ballistic, and a medium energy (small energies tend towards PD duty in my builds). Tracking missiles which, can be fired from any orientation, so 2 large and 2 medium missile mounts can be brought to bear - just as much as the ballistic compliment.
1066 base energy DPS is nice with dual Mjolnir out to 1440 range, and HACs add another 856 to shields out to 1280 range, for 68 OP and 1726 flux per second. Although the flux per second could be converted to OP equivalent in terms of Stabilized shields (480->240 shield upkeep is worth 24 OP of vents, but Stabilized Shield is only 15 OP), and then another 50 OP for 500 flux/second vents, and another 20 OP for 150 flux/second from Flux Distributor. So really, if you're looking at it from a flux neutral-ish point of view, those 4 ballistic weapons really cost 68 OP plus 85, or a net 153 OP cost. If we look at in terms of damage windows, that's 19,222 shield damage in 10 seconds, assuming every shot hits.
For me, I consider the fact that dual Squalls against most shield heavy and PD inefficient enemies (high tech/Remnants fit the bill) in a 10 second window will do 20,000 shield damage out to 2,500 range for 0 flux, to be very attractive. The 0 flux cost allows you to keep a 0-flux speed boost while putting hard flux on enemy shields, or alternatively, if timed right, will keep an enemy's shields up while you vent. It is an investment of about 90 OP (40 OP for Squalls, 20 for ECCM, 30 for Expanded Missile racks), but for me that effectively doubles the shield burst DPS, even if it is limited to 232 seconds of continuous fire. And at the point I've got 50 OP in ECCM and Expanded Missile racks, might as well throw on Harpoons in the mediums for just 20 OP more to help finish off smaller ships quickly. 8 Harpoons at once will give any flanking frigate or destroyer a bad day, and will even take a chunk out of an overloaded capital. I'm more likely to leave the medium energy mounts empty than the medium missile mounts, especially if I'm running flux hungry Mjolnirs.
However, I consider the best feature of Squalls and Hurricanes is they shoot over allies. Which means if I'm running tanky cruisers backed up by multiple AI run DPS Conquests, the Conquests are still firing something at the enemy when there's a line of friendly cruisers in the way. I figure some DPS is better than no DPS in that situation.