You literally posted one second after I did
Alright, here's the issue I see with dropping Sol in my team.
The point is that my team's damage output is... trash, since I'm hitting about as hard as my debuffs allow me to. Paraphrasing Bear, my damage has officially hit the debuff ceiling, and I don't have much to go for. But that's kinda the trap I have with my water set up, or what I feel in general about the water meta.
How would I change that? Water has like... 4 practical dps himes so far as I can tell. Asherah, Oceanus, Shiva, maybe Anahit. Ea, if you really want to force that in. Neptune, in the future, and she's not strictly a nuker I guess. Even if I sub in Oceanus or Ea for Sol, is the damage output increase significant enough for me to flat out murder enemies the way fire does with Uriel/ Svarog, or thunder with future Brahma? ... I don't think so, but correct me if I'm wrong. Asherah seems to be the only option where nuking with water seems viable... guess who doesn't have her
Tl;dr: I don't see dropping Sol giving me that significant of an advantage in terms of damage output, my hime composition seems to be hard capping me at the moment. Please do tell if that's another misconception.
Also, given your bottom statement, I'm going to go ahead and assume that Joan is the most viable option I have now?