Forcing the AI to do ships with 3 weapon families

[Ragnarok-X]

hey, fast question. I want my AI to design ships using 3 weapon families. I can get two families by using the majority and secondary ability, but is it actually possible to get a third weapon in the design, somehow ? In fact i want my ship to use 2 normal weapons, one short and one longrange. A third weapon family is needed because using the general "Point-defense" ability would not work, since i want the AI to use a specific point-defense weapon, and not the one with the most damage output (or however it chooses). I dont have enough AI-Tags for each point-defense weapon as well.

Any suggestions ?!