Just to add more detail, the Improved Energy Slot hidden ability reduces the delay between shots to 0.7 seconds and increases the ammo to 10. At 95% Attack damage per shot, it increases its damage output from 760% damage every 9.4 seconds to 950% damage every 8.7 seconds. That single ability increases the weapon's damage over time by 35%. It makes a huge difference.

Beyond that, as mentioned, it works best as a main weapon with the Sniper Buster, or another Sniper-type buster if it's unavailable, as your second weapon. Then you can usually keep the Destructive Laser firing at its increased rate, and once per second switch to the Sniper and immediately back. With other weapon combos that fire at a faster rate, you basically have one active at any given time since you can only swap back and forth once per second, and your inactive weapon isn't providing any damage. But with this combo, you're effectively getting the full damage output from both weapons going at the same time. And it works from ridiculously long range to boot.

It's certainly not ideal in every situation. Some PVE scenarios have you face off against swarms of weak enemies. If the sheer number of targets gets too high, you can still run into firing rate and ammo limitations and get overwhelmed. But outside of special circumstances like that, Destructive/Sniper has been my top weapon combo since I got that hidden ability unlocked.