I can't believe it took me until today to think about the Wed. dungeon and realize there's absolutely no point in using poison or armor break anymore, when I can just sweep it in 5 turns with the Horus/Bastet farm team I use for everything. 60k/100k armor is nothing, durrrrr.
Malinatar:
1. A bit more damage than Valkyrie, but you lose the orb change and gain a HP requirement which makes any descend with a first strike suck.
2. There's a JP guy who does descend videos of Sonia, but he's awfully specialized. His first ones are pretty normal but later on he has 3 Sonias that are all Lv.99/+297/fully awoken. I think she's a great sub for a Satan or mono-red team due to her orb change's synergy with Enhanced Att. skills.
3. She's good at 3.5x but compared to a Satan team you lose out on *6* Enhanced Dark Att. skills, and that's a huge part of being able to burst a boss with a Satan team. Also, same issue with first strikers as LTron.
Feel free to correct me, but I'm not sure 12.5x is enough to run the mythic-level descends (and Sonia is 2.5x RCV and ATK for devils). I honestly feel 16x is the minimum. Even matching Sonia with Satan or DQ Hera you only get 8.75x (though the 2.5x RCV is nice).
Chinese gods (well, Haku and Leilan anyway... I don't know much about the others) can work for Mythical because the orb change results in a much higher burst than would normally be possible with a 12.25x team. I agree that it's still not as easy as 16-25x all the time though, which has forced me to basically move to Horus as my main leader despite all the effort I put into Haku. Still though, I can tell when I get a boss and do a combo with Horus/Bastet, or even Horus/Kirin most of the time, that I'm doing less damage to the boss than my Haku team does with a board that is nothing but R/B/D. Orb changes with Horus/Kirin keep you from getting trolled and doing no damage at all; orb change with Haku is a massive damage increase. Actually getting to the boss alive is a lot easier though, even with my somewhat underdeveloped subs.
Also, Sonia with Satan? I think you need another cup of coffee this morning.