[Novice Question] Technician: Crusader Shield Build - Looking for "shield mods" advice for Solo Legendary/Heroic Runs

Hello fellow agents, novice agent here looking to put together my first Crusader Shield build for solo play. I'm focusing on clearing Heroic missions and eventually tackling solo Legendary runs.

I'm currently farming Countdown to optimize my pieces. What are the "Best in Slot" mods for the Crusader Shield itself? Should I focus entirely on Shield Health, or is Active/Holstered Regen worth it for solo?

Also, I’m planning on running the Technician spec for the Artificer Hive synergy—does that change which shield mods I should look for? Any advice on Gear Mods (like PFE) would be greatly appreciated too!