Why is light not mentioned? Let me try to take a quick stab at light:

Diana is probably core of any light SR team - she brings A frame def down, team-wide atk up and self heal/buffs. Light Ama is the only B frame debuffer, but it's only 10% and she's an event hime, so if you missed her event, you have to get lucky with advent raid ticket draws. I would pass on her and just EX sniper shot if you need B frame debuffs. No light SR C frame debuffers that I'm aware of. Sati has light rst down though and has strong nuke against dark and guaranteed critical.

If you need BP after you've already EX sniper shot, Forseti is your answer, who brings A frame atk down and combo down in addition to BP. Her BP CD is kinda long, but should be fine as long as things don't drag on for too long.

For heal, you're stuck with Belobog unless you have Attar from event or raid tickets. Attar's heal can cleanse once at lvl 65+, whereas Belobog has a separate cleanse skill. I usually prefer Attar 'cos Belobog's atk down is also A frame and covered by Forseti. Attar's cover + Kubera (R) nullify is also an awesome combo.

For offense, best ones imo are Durga and Anteros, 'cos they're fast and thus can actually increase your burst cycle speed. The old post mentioned Artemis, but she just nukes and does nothing else. Bursting more frequently is a much bigger dmg boost. I actually don't like Durga nor Anteros though - one is too RNG the other one is too fragile. I usually go with Durga, but ppl's preferences may be different.

Djehuti has a 5% hp passive that works even in sub, so she's your first choice for sub.

Also, it would be a mistake to build a non-SSR light team without mentioning two R himes:
1. Kubera, who brings single target nullify as well as a 40% team def buff on 2/4 CD but costs 15% hp (totally worth it though.)
2. Lunar Glory Caspiel, who brings the extremely rare C frame def down and a stacking frame def down.
Those two are my standard choices for all the use 3 R GO missions.

If I'm going glass canon, I would bring Durga, Diana, Sati, Caspiel.
If I want to turtle, I would bring Diana, Forseti, Attar, Kubera.
If I want a more balanced build, I usually drop Forseti for Durga or Sati - I really like Attar + Kubera combo, it's basically like a mini Gaia AW.