Here is another build to consider which is mostly a copy of what the Down to Earth Astronomy guy on youtube has been refining for years.
A ship builder, outfitting and comparison tool for Elite Dangerous
s.orbis.zone
The beam lasers are long range, which means you really to grade 5 charge enhanced with super capacitors power distributor to make it work.
The problem with the Corvette is its big and fat and slow and hard to keep your targets inside 1500m and almost impossible within 500m which is needed to get the best damage from efficient beams. Grade 2 or 3 long range gimbled beams do more damage than efficient beams over 1500m range but wobble too much stay on target well much beyond 4000m, so there is no need to engineer more than grade 3 (up to 4800m). I did grade 5 long range since I had the materials going spare.
This build works extremely well for me as someone who needs a conventional gimballed beam laser and multicannon set up to get the best results. I'm no combat ace. This ship blows up medium and large targets faster than any other ship I've tried. Smaller faster targets are a bit trickier, but pose no threat.