Thread:KOTails/@comment-70.77.153.187-20190625220053/@comment-26447088-20190626020404

While getting Seiten Taisei is a lucky pull, she's actually a defense unit so she's not really meant to be run in deck. She can do for now until you get better units to replace her because of her naturally higher stats, but as a Pound unit she doesn't do too well at dealing damage, plus her Passive doesn't really do anything for you on offense.

Sadly to say, Cao Cao is also kinda meh nowadays because decks are more multi-elemented than mono-element with Jeanne d'Arc (Golden Week) and Gilles de Rais (Remix) being a really strong combo. You can survive without getting them yourself and just running them as assist, though, so I would suggest joining a stronger/more active union if they're not already available as assists. This way it saves you the medals in the meantime to get better units and +2 your plats.

Arthur (Hero) is what most people use in Water decks I believe, as Water is lacking a good damage dealer otherwise. The best alternative at the moment is still the good old Asmodeus (Remix) because she gets a 100% damage boost after a Pact drops her HP, but since you have Ishtar (Slumber) Aristotle is probably your best bet for synergy's sake.

With what you have right now, I would suggest building Ishtar (Slumber), Aristotle, Jiang Ziya, Mercury, and one other unit. Good candidates for the last slot would be: Asmodeus (Remix) - really good damage dealer, but takes a while to get going since you need to use her Pact ability to drop her HP for her boost. Best paired with a turn reducer like Metis (Christmas) or Mazu, though if you are able to wait for it to be ready with a Djehuti/Kolga (Easter) assist for the extra ability turn reductions, you can survive without the turn reducing passive. Randgrid - she has a really good passive, covering the best passive effects that Arthur (Hero) has, minus the heal over time and lower skill chance (45% in CTA vs Arthur's 55% in any event). Her ATK/Skill boost is also slightly less, but not by much. I would highly recommend getting her, as she's overall probably one of the best regular Water 7 stars. Bunyan (Winter) - Good debuffs and ability turn reduction, which is probably one of the best passive effects combined with ability spam. Her ATK boost is wasted as it only applies to Slice units, though. Metis (Christmas)/Mazu - both pretty much have the same effect, and is rather a matter of Revive vs Water Boost, Rush vs Multi, and Slice vs Flurry (flurries deal more damage though). Best combined with Asmodeus. They charge half the Burst gauge when their Passive procs, meaning that you can use half the burst bar (4 attack actions) to attack, and if you get another Passive proc the next wave it'll be back to full and ready to use again.

As for units I would consider selling for medals to buy the plats to help build your Water deck: Jeanne d'Arc - she's outdated, as her Critical effect is easily replaced by the Jeanne d'Arc (Golden Week) & Gilles de Rais (Remix) combo that gives you near guaranteed crits for all units. Quicksilver - just too inconsistent for getting extra actions, often better off using the deck slot for someone else Cao Cao - if you get Asmodeus and/or Aristotle, Cao Cao would be replaced due to her Unique's boost conditions being too difficult to meet in the game's current meta. Fortuna - her Unique is far too inconsistent at getting the effect you actually need. Daphne - slow boost, only useful in clearing the Trials of the Ages where there's many waves or the Disgaea collab event (which only came once a year). Often better off with an alternative booster Cerberus (Hot Spring) - defensive unit, but even at that nowadays she doesn't defend that well. Mainly used for scouting in Fortress Frenzy nowadays, so I guess she's worth keeping in that case should you decide to join a more hardcore union for Fortress Frenzy.

Hope this helps, if you have any other questions feel free to ask. Best way to contact me is actually on LINE at KOTails, as I don't actually check this that often haha