Drowning...
Although I should just copy down this chunk of text for future reference...
I'm guessing Hercules don't belong here because her DATA buffs don't spread to the whole team?
Well, it's practically humping a dead horse by this point, but go farm disaster assault weapons. Really, it should be easy as all hell now that almost all the catastrophes are released. They do more good for your grid than you want to realise initially, but will eventually accept if you do actually do it.
And so, for reference why not show the water team? Your water grids are only an eventuality anyway, himes are much harder to get.