Max out the frontal armor and have about half on the rear (balance out your tonnage with this)
The Centurion does really well as a missile boat. Add the biggest LRMs, a few medium lasers and max the frontal armor.
The Blackjack does well as fire support, trade the AC2s for one AC5, add medium lasers and max frontal armor.
I'd make the Wolverine a close range brawler with as many SRMs and medium lasers as you can fit and max the frontal armor. Replace with a Shadowhawk, 2D preferably, as soon as you can as the Shadowhawk is the best melee combatant that you'll come across for a long time.
Park the Spider as soon as you can as its rather flimsy, but until then max frontal armor and give it what weapons you can.