I'd say, pick a single HQ & go with it. Then you can have your trueborn cake and eat it. We rarely need to spend points on a 2nd HQ except for big games, or when building 'death star' units.
Btw, I was a little confused by you wanting AI trueborn on top of the shredderborn, which are pretty much an AI option themselves: splinter cannons perhaps?
The Kabal of Shadows Ascendant
"Cruelty has a Human Heart" - William Blake
99% of war is killing time. The rest is the killing time.