How aboot all-lazerr loadout (think 2 large pulse, 2 medium beam) would that work?
All lasers have 2 main problems.
First is they all drain power and overheat quickly. While this might be fine if you're just looking for high damage in a short period of time, the downtime can become a limiting factor against larger ships since even with constantly pointing at the enemy, you're only shooting 1/3 or 1/2 the time.
Second is that it's all thermal damage. Thermal is good against shields, but is less efficient at going through armor or damaging subsystems. Again, less of a problem against smaller ships, but can become a limiting factor against larger ones (especially if fitted with reflective armor).
Generally it's advised to have one thermal set of weapons, one kinetic set. Thermal to drop shields, kinetic to tear apart armor. Having both will also give you a way of dealing with reflective/reactive armored opponents more efficiently.
For the large mounts I would go with either pulse lasers or cannons, for the medium I would go with either multicannons or beam lasers; being 2 large pulse and 2 medium multicannons, or 2 large cannons and 2 medium lasers. This would give you both the flexibility as well as allow you to alternate between weapons while one is cooling down or reloading. This will allow you to maintain nearly constant damage as well as have the flexibility.