Originally Posted by
Cobblemaniac
That's a good reference I can begin with, although I have another question: how good are your other elements? I will assume these 2 elements are your only decent ones first, as with my worst case scenario rule. Also, I'm going to begin assuming that most content is a breeze for you to clear, with the exception of thunder.
Your water team has basically hit the ceiling with its potential, which is being gated by Asherah so far. Drawing comparison to myself, because I'm in a very similar water setup with yours, you may or may not wish to invest further to break that gate, mainly for the purpose of guild orders which will hopefully be implemented next update. Briefly, your water team will be about sufficient to not be screwed completely, but to perform well might be a struggle. Your grids shouldn't be the bottleneck, IMO the Asherah or not will be.
My recommendation will for the moment, shift to m-tixing Pluto, however not for the reasons you would (filling in damage and missing relic). Weapons and relic are matters of time, which are a bit less pressing than the matters of himes themselves. Assuming the 2 element thing, your main concerns for now are thunder content, and GO. If any element(s) should be something you throw at everything (damn, I'm really becoming attached to this term. thanks nonsensei), it's either dark or light, with the simple reason of having no disadvantage to other elements. Without element advantage you'll still struggle in GO content, but at the very least you'll have something to throw at all the bullshit that comes your way till you get something better.
If I jump a step further and say you do have decent setups for all your other elements... well it's harder to decide then. Your water team really can't go much further without Asherah (it's kinda like the Mammon barrier with thunder, but in terms of damage capability), while your dark team has, and will get a bit more space to develop.