I'm looking at using beams/pulses combined with MCs on my DBS until I can grind up to a FAS, where I'll likely use a similar setup.
running a DBS myself (really enjoying small ships), i have a lot of different set-ups with it... with a lot of different lasers.
one of the limiting factors of a DBS is its powerdistributor. you want to get the most out of it. two small beams/ two medium MC are heavy on the powerdistributor for taking down larger ships shields, if the small beams are not engineered efficient. so here are what i have explored so far.
- standard set-up: long-range beam, MC, 2 small cannons. works very well. medium beams have less distributor draw than two small beams. longrange allows you to use the speed of a DBS to attack ships out of their weapon range. when shields are down, get close.
- combatzone set-up: focussed burst, medium MC, 2 small cannons. the added arour penetration of focussed works nicely here!
- haz res hunting: small beam, focussed burst, medium MC, small cannons. if you have to take down shields all by yourself, and want to kill modules.
generally speaking, the DBS has perfect hardpoints placements for using fixed, and the second best heat-capacity in the game - i also run it with double medium plasma or double medium railguns in between. there it gets quite a heavy hitter. small cannons are great to hit above their size ... i'd say it makes more sense to fit them, than to fit two small lasers for stripping shields, because they will be very often too heavy for the powerdistributor, if engineered.