While what I will say isn't related to finding good colony candidates, I might as well post these seeds here since the stuff I'm looking for also happen to be seeded (I use a personal script to find good seeds much faster).
For those interested in the loot drops from the Hypershunt defenders, I found these 4 seeds which provide 3-4 of the same large weapon:
Seeds with Hypershunt locations + loot drops
MN-4813297664153669580 (4 Rift Cascade Emitters)
Hypershunt in Rama and Pitrloka
MN-4442775152998569644 (3 Volatile Particle Drivers + 1 Reality Disruptor)
Hypershunt in Kydoimos and Xaphan
MN-1081056032028983448 (3 Rift Torpedo Launchers + 1 Rift Cascade Emitter)
Hypershunt in Cha and Svaron
MN-211794512586131020 (3 Reality Disruptors + 1 Rift Cascade Emitter)
Hypershunt in Cadmus and Pelesius
I also found a seed with 4 of the same level 7 exceptional officer (with Missile Specialization, Gunnery Implants, Damage Control, Impact Mitigation, Polarized Armor, Ballistic Mastery, and Target Analysis) here:
Locations of all exceptional officers in MN-2297924031254980920
MN-2297924031254980920- Derelict ship in Zirnitra
- Derelict ship in Berith
- Derelict ship in Buyan
- Mining Station in Smok
These seeds should work with 0.98a-RC8, as long as there are no installed mods that interfere with procedural generation (I didn't actually test these seeds on a completely-vanilla setting, but I only ran utility mods while finding these seeds, so the seeds should carry over just fine).