hi, drop the barracudas and mantas. use markers instead.
One Warden pack is enough to get your fleets at 1500 pts. In large games three for your custodian, there yiu can use gun variants of the Emissaries.
In small games without the battleship use the grav hook variant of the Emissary.
If you have good play experience with them you can always order a second pack plus another Protector one.