Do you have any proof that it's dark mobs that aren't spawning, instead of light mobs that just didn't spawn?
I mean, it's not impossible, but I find it odd.With Gaia, I'm not sure you'll need Sol. Your damage output is hurting to begin with.
I think I'd rather run Mordred with Sniper Shot, that way you get BP, Sniper Shot AND debuff-. Hastur's Def Down doesn't reach 100% without debuff- even with elemental advantage AND 6% Accessories, though it is very, very close (and reminder that Ult Thunder has a reduced resistance, so even Sniper Shot will land on that thing 100%).
As for the team, Hastur, Gaia, Zephyrus, Ithaqua, I guess. That should catch you all the debuffs you need while giving you decent heals. It's a shame that you don't have Freya, since Awakened Gaia-Freya-Puck is a fun little combo.My opinion to this is the same as before: always bring Vine when below 50% Def Down.
In content which doesn't last you 8 turns, the damage loss from Vine is insignificant.
In content which lasts you over 8 turns, the damage gain from Vine is incredible.
"Not taking Vine" is going to be an option once Hercules' Relic comes out. That's still months away assuming we stick to DMM's schedule... and we're weeks behind on that. Thanks, Nutaku.