[Rollo]

If this is all about adding specific point-defense, it can be done without AI-tags or dummy abilities. In fact it can be done without altering the designs, too.

Add higher tech level requirements (dummy levels) to the PDC that the AI should prefer. And establish a hierachy or pick order for the AI by adding redundant tech levels.

Example:

Name := Comp X
Number of Tech Req := 4
Tech Area Req 1 := Tech A
Tech Level Req 1 := 1
Tech Area Req 2 := Tech A
Tech Level Req 2 := 1
Tech Area Req 3 := Tech A
Tech Level Req 3 := 1
Tech Area Req 4 := Tech B
Tech Level Req 4 := 1

The component still need only 2 tech levels. Tech A Level 1 and Tech 2 Level 1. But it has 2 dummy levels of Tech A. Thus making the level total 4 and the AI will use this component over any other that has 3 levels or fewer.

I hope this helps.