Here are some of my favorite fits:
Myron: Decent passive buffer. Strong active tank. Only problem (as I have said before) is that the hardener visual affect blocks a gunners view too much, making it extremely difficult to fight back AV. If it could be removed from turrets or (more likely) toned down and made more transparent, it would help a lot.
Active Grimsnes: Haven't tried this, was just theorycrafting but it looks pretty good. Extra shielding in a pinch, armor hardener increases reps to about 167ehp/s. 5767ehp before reps. However, it also has the problem of hardeners blocking gunners' view.
Python: The tried and true. Best fit imo. I have noticed other pilots using a complex light shield booster over the light extender and have been wanting to try it myself. I've considered changing my tactic to always have an AB running and retreat when it's recharging, using the booster as emergency ehp.
The
"Rattati Semapi Noticed Me": Haven't really had much success as far as team usage, but I still think it's worth keeping around. Maybe one day it will. (Though I still want a PG reduction for the mCRU to fit a better AB, among other reasons)
Incubus: Best Incubus fit. Can fit all proto turrets. (Requires armor fitting 3 with basic AB, 4 for ADV AB).
I'll post a proper reply later today, I have classes for now.
One thing I'd wish you'd consider is introducing turret variants to fill specific roles.
Some ideas:
Accelerated Missile: AV specialized; high direct damage, low splash damage and radius, faster with longer range for air-to-air.
Fragmented Missiles: AI specialized; larger radius and moderate splash damage, lower direct damage, shorter range (150-175 perhaps).
Scattered Blaster: For LAVs and tanks; very high rof and moderate RoF (highest dps), short range with considerable dispersion, fast rotation speed.
Condensed Blaster: For DSs; low RoF with higher damage per shot (still lower DPS than above), longer range and tighter dispersion, very low rotation speed (near rail level, to prevent use on LAVs, DS gunners don't need to turn as fast because of the longer ranges they'll be engaging and their limited turning anyway).
[Rails TBD]