The covette is a dedicated combat ship, much much better at that one thing. The anaconda's an all-rounder so it's better at everything else.
For a combat fit PVE anaconda huge and big multicannons one thermal one caustic bottom mounts, then efficient large lasers (whatever type you like) on the top, with efficient laser turrets on the small and medium mounts. Big bi-weave shield, fighter bay, SCB with a heat sink, loads of shield boosters. HRP's everywhere else, swap these with cargo bays for very heavily armed trading.
Shield boosters still something to install? haven't been in game for awhile as I can't stay in game for longer periods due to lack of an autopilot, the press J to jump 800 times just kills it for me.