I'm unconvinced that the heavy blaster's dps actually mitigates its poor efficiency when it comes to anti-shield. The factors that make that true are niche: when I'm actually fielding the weapon I find it to be a poor shield breaker because the ships mounting it flux themselves out before breaking the shield unless they have very high flux stats (SO ships use it well for example).
Its a great weapon, but not very good vs shields.
It is, when player piloted.
You slowly build up shield flux on target (possible in multiple passes, venting close to enemy - AI almost never counter-vents), then time it so that you have full flux capacity to dump when enemy is about to overload. This is what a HB Wolf has to do vs Enforcer, for example. Though in a better scenario, you build up flux mostly with other weapons, and use HB only for flux regen overflow, like 2 Railgun + 2 HB Medusa.
On the other hand there is nothing you could smartly exploit about Pulse Laser - it's lackluster through and through.