sneak preview:
raving's bans
shockwave: for other elements, this is surprising, for water, not so much, insta-kill is too nice to give up
miracle: completely shuts down ice bolt/miracle stall
phase shield: this is quite a game changer, i can see why it's banned
discord: despite water being more of a "support" element, it's used in duos, or trios the most, discord will still hurt it
poison: no poison rush for nils i guess...
deflag: fire/water is stronger than what most ppl think, this shuts down about 20% of that, as PC is one of the most important value fire offers in the duo
nils' bans
wings: i like this ban more than dim shield personally, since most water creatures are not airborne (only dragons are), and this is cheaper, also lasts 2 turns longer
miracle: see miracle
phase shield: see phase shield
steal: hurts more than explosion, but i think explosion is a better ban for reasons mention in "deflag"
deflag: well, i guess nils can ban both
nova: now, this is interesting.. as nova isn't that good when your deck is 50% water..
raving shuts down miracle stall, and semi shuts down poison rush/stall, tho he doesn't have wings or phase shield, but he does have permafrost, and nils can't use deflag or steal...
nils on the other hand shut down miracle stall, and two of the best shields raving can use, and left raving without too much viable PC (he himself doesn't either tho), so... i can see maybe 3 out of 7 or 8 decks having permafrost
overall, it's pretty even