Oh sure, if you pile Beams on a ship I guess the lower TV efficiency on, huh, Efficient beams won't matter that much.
But I don't think there's a ship with enough hardpoints for me to slap 4 Beams, the most I have is 3 on the Vette I bought recently, and I'm already thinking of throwing the Large one out and replace it with a Corrosive MC, and replace the 2 Small MCs (Emissive / Corrosive) with Rails.
I've had too many tanky ships wake on me in CZs with less than 10% hull, I always need something punchier than damn lasers![]()
4 Efficient medium beams with TV cools my ship down so much that the cockpit frosts over in most fights... It's very handy if you have more than one npc shooting at you as they tend to lose target lock sometimes.
It's very handy if you have a ship that tends to run hot.
Better use 4 MC on medium with mixed corrosive, OC, autoloader, etc, and in the huge an efficient beam with TV - you will kill your target a lot faster ; Beams are great at taking out shields, but against hull they struggle, when the MC does the job a lot faster. Put in a key for the beam, and other for the MC.s - cook the target with the Beam until you get the shields down, then use the 4 MC to crash the hull fast.
FDL cannot take to many hits, so your best interest is to kill FAST. For assassination missions when the target is protected by several other ships, the time to execute the kill is crucial.
If you hang there too much, you can get easy to rebuy screen...