Here is my current character
-Everybody on the team has fully upgraded personal armour, 20 mk II trauma kits on inventory & couple smoke grenades.
Sam wields baton & double barreled shotgun, Ray improved revolver & reinforced baseball bat+ grenades, De Soto sniper rifle & improved revolver.
Furey has 2nd tier smg, 2nd tier machete and incendiary grenades (not much use for those though; enemies seldom seem to gather into convenient groups outside of melee range, besides I try to go non-lethal as much as possible.)
-I've maxed out 2 out of 5 facilities (others are lvl 4) and I could max third if I sold excess trauma kits from storage (about 100+ of both mk I's and II's).
-I've done mostly non-lethal take downs, only exceptions being Furey's license to kill every survivalist that she can and two early engagements where I had to take gloves off (2nd one of those was the only one that I've lost so far; stopped ignoring available cover when fighting ranged enemies after that.)
-Despite letting Elena work her frustrations out on survivalists (probably 20+ on bodybags during less than month of games time) I have maxed out reputation and relationship on "rapport" with all companions (Furey lags bit behind.)
Perhaps reputation penalty for any killing should be higher?
-Relationship on rapport level doesn't seem to give any bonuses.
-My "strategy" has been very simple; I simply find out where highest danger level is and attack there. It's doable because I seem be massively over leveled compared to opposition (I'm currently getting level 5 mooks against my level 25 Sam & level 24 companions)
-Survivalists seem to be the most dangerous gang with plenty of ranged units around that have started wielding assault rifles, church is the easiest one with their basic mooks only starting to wield hammers and basic pistols. Mafia falls somewhere in between, their specialists seem to be more common than with other gangs.
-I think the reason why the church seems to lag behind is because they were spawned into poorer territories. So enemy AI may have to operate using limited resources generated by game's economy. Good.
-Despite my character's current being level 25 and enemies averaging lvl 5; I think they are catching up with their improving equipment.
As far I know I have the best armour available and enemy equipment keeps getting better. I've had to use cover more carefully and concentrate firepower to neutralize some greater threats.
-Armours seem to deteriorate quickly when taking damage. This is good, walking tanks wouldn't fit the setting.
-I think it's bit silly that I could set grenades into non-lethal. Some weapons should be just plain deadly regardless of intent.
-Currently intent seems to always decide if take down is lethal or not.
-Battle mechanics (cover, overwatch, attack of opportunity) seem to work as intended.
-Wounded enemies try occasionally flee like they should. I seldom let any of them escape.
-Player retreating seems to work as well.
-Interrogation is working though intel about bosses and rackets is rare, I think. Truth serum seems kinda
-Loot after battle is rather low end and containers quite easy to open. Though I'm playing utility character.
edit.
-Temporal allies don't seem so strong in latter levels, with their lack of armour. They went from the best tanks on battlefield from earlier levels to people that I have spend some effort to protect.
I probably should try switching into higher difficulty level.