These are my suggestions:
Powerful version of Punisher:
Attack Charge instead of Thermo. (inspired from Odion)
Increased chance of crits for blaster, sb, rockets. (special)
Attack Charge stays long like Attack Charge Turret.
Powerful version of Myst:
Aggrobomb instead of Stun. (Inspired from Horus)
Aggrobomb shorter cooldown. (same time with os)
Powerful version of Defender:
Orbital Strike instead of Attack Charge Turret. (Inspired from Khones)
Mines shorter cooldown like 30 seconds.
Multiple mines. (Inspired from Anubis).
Powerful version of Sniper:
Aim Computer instead of Attack Droid. (Inspired from Abasis).
Attack Charge stays long like Attack Charge Turret.
Multiple Orbital Strike. (Inspired from Keops).
Powerful version of Engi:
Speed Actuator instead of Materializer.
Repair Field stays longer like Repair Turret.
Increased armor. (special)
Powerful version of Legion:
Multiple Sticky Bomb instead of Materializer.
Aim Scrambler instead of Stun.
Powerful version of Emperor:
Aim Computer instead of Perforator.
Multiple Thermo. (Inspired from Osiris)
Powerful version of Punisher:
Attack Charge instead of Thermo. (inspired from Odion)
Increased chance of crits for blaster, sb, rockets. (special)
Attack Charge stays long like Attack Charge Turret.
Powerful version of Myst:
Aggrobomb instead of Stun. (Inspired from Horus)
Aggrobomb shorter cooldown. (same time with os)
Powerful version of Defender:
Orbital Strike instead of Attack Charge Turret. (Inspired from Khones)
Mines shorter cooldown like 30 seconds.
Multiple mines. (Inspired from Anubis).
Powerful version of Sniper:
Aim Computer instead of Attack Droid. (Inspired from Abasis).
Attack Charge stays long like Attack Charge Turret.
Multiple Orbital Strike. (Inspired from Keops).
Powerful version of Engi:
Speed Actuator instead of Materializer.
Repair Field stays longer like Repair Turret.
Increased armor. (special)
Powerful version of Legion:
Multiple Sticky Bomb instead of Materializer.
Aim Scrambler instead of Stun.
Powerful version of Emperor:
Aim Computer instead of Perforator.
Multiple Thermo. (Inspired from Osiris)