Thread:KOTails/@comment-14.164.139.31-20171216103939/@comment-26447088-20171217143705

Jeanne d'Arc is outdated, while still being a decent damage dealer. Since her Unique is only 25%, it's not nearly going to dish out as much damage as any of the others I mentioned before.

Generally, it's recommended to get the damage dealer first, since they usually have Multi/Rush which opens up their versatility in the types of events and situations they can be used in. So this is a tough one, since Asmodeus would be that plat, but it's recommended that she's Scrolled so that you can get her Unique up quickly.

If you're still keen on going Water, I'd suggest Jiang Ziya or Mercury since they'll be useful from the start, I guess. It also depends what your Union has set as Assists, since you can stack two Jiang Ziyas but not two Mercury's. So if your union has a Mercury available as Assist, I'd go with Jiang Ziya instead. The only issue I see is that they both only have Multi skills, not Multi/Rush, so you'll be relying on normal 7*s with Rush skills to be your damage dealer on bosses.