This is a somewhat effective setup as an support ship. Head on, not so much. Heres what I use.
1xLight Motar
2xPulse
1x Order Missile Turret
4x Order Cruiser Cannon
All for support role from a range of say 2.5-3k. Bombarding Enemy Capitals. Missile has 5k range I believe, Motar and Pulse have good effective range also. 3 Weapon groups with missile on its own dedicated key.
Missile can drop a gunboat shield fairly fast if you need it for those and does fairly good hull dammage as well.