Using the new sorter I found what each faction lack (also arranged from fewest to faction with most heroes)
- Mercenary - Energy Frontline
- Watch - Mech Midline
- Rangers - Energy or Mech Frontline
- KLG Black Ops - Frontline Bio
- Patriots - Mech Rearline
- Shoremen - Energy Midline
- KLG Irregulars - Bio Rearline
- UAF - Bio Midline
- UAF Airborne - Bio Frontline
- Morlocks - Mech Rearline
Would be great to see if the next new heroes would be able fill them up.
If you don’t find a faction here, it means they are well diversed.