That fit also has a 1mn afterburner. A single lit fart in the grim darkness of space.
The fit might be still tight for a harbinger with the heavy lasers. Maybe medium lasers with navy gamma would give better application with lower pg and cap use. A cap charger can be replaced with a tracking computer to give either range or better tracking vs frigates. For getting through l3’s quickly, having better tracking and a range of laser crystals for different ranges is useful. Remember that doing 500dps with multifrequency on paper might seem better, but all of that might be missing because of bad tracking. Also other crystals use less capacitor. Which means that you can be shooting for longer.
Of course a 10mn y-s8 afterburner should be used for the lower pg and cap use. And it is the right side as well.
A harbinger navy issue is much easier for fitting and can even be shield tanked reasonably well. Can handle some l4 missions as well.