I got enough fous to finish Musashi today. Lv100, 10/10/10, 2000/2000, NP4, bond 10. Now I just need one more copy to fully max her.
Damn, that's some dedication. I stlil haven't even max grailed a servant, much less gold fou'd them. What a beast vs. lancers.
I really need to sit down and think about my most used servants and start burning some fous and grails, I'm always almost out of space in servant inventory because I sit on fous/gold fous for so long, and my mailbox is about to start expiring them in a few weeks from shop purchases. The only two servants I even grailed so far were Cu (lancer) and Arash, and that was only to 90.
There are so many characters that I like, it's hard to pick one to max out. I guess if I had a favorite right now it'd be Okita Alter, but she's so hard to use in any meaningful content, or even in daily farming since ember stages always have a mix of knights/cavalry so she's never doing great damage. Any time I see mixed cavalry stages though, she's instantly on my team. I'm just going to type it out here to organize some thoughts about my possible grail projects:
Saber: Artoria Alter/Fran/Mordred. I like all 3 characters, but Alter and Mordred have a lot of overlap, and Artoria is better from a party cost viewpoint being a 4*. Fran is a lot of fun now that Skadi is around. She'd be perfect with one more Arts card and one less Buster to NP loop on bosses. Buff removal is great for bosses too.
Lancer: I really like Eresh's design and animations, but she's terrible. She has a buster kit and skills that look to be made for Buster stall teams, but that's just not a thing. Raikou is the easy choice here as she's a boss destroyer with double Merlin. She's my go to for all archer/berserker bosses currently with how strong her skills are. I also like Bradamante who will be coming out in a bit, but not sure how her kit is.
Archer: Gil is probably my most used non-Arash archer, he's just always a good fit. I am going to try to NP2 him at this upcoming Gil-fest. Otherwise, I like Tomoe and I really like Fujino, I wish I'd have gone for more NP levels for her. I have NP2 Squirtoria but I don't really arts stall that much.
Rider: I really like Drake (NP3), Squirtoria alter, and summer Mo, but I somehow got spooked by Ozzy and have him at NP3 so he deletes caster bosses. Probably a low priority class for grails for me just because I have strong servants with high NP levels.
Caster: No sense in grailing support casters unless you want the extra HP, so I guess it'd be Sanzang, but I won't grail her unless I manage to NP2 her at least. Otherwise, I'm really looking forward to caster Shuten coming up as our Halloween welfare.
Assassin: Likely my biggest target for grails just because I don't feel like I have a strong assassin, either ST or AoE. Even King Hassan doesn't feel particularly strong. I like a lot of assassin characters, but they all just feel weak, and I hate Arts NPs for this class. I also hate that by default if you're using Assassins vs. a Rider boss, your support casters are automatically liabilities. I did just get NP2 Jack though, so maybe her? We'll see. I also like Okada who I just NP5'd last night. He has higher than average NP damage, so I might get him to 70 and play around to see if I want to grail him. If only his NP gimmick wasn't insta-death. Nothing worth fighting is vulnerable to death, so it's such a wasted effect. Also, level for level I don't think he's beating the "Default" good Assassin, Shiki.
Zerkers: Either Cuzilla or Raikou, the rest of them either die too fast or are just used for farming waves, and those don't need grails. Catalante is a personal favorite, design wise. Maybe someday for her. Definitely gonna grail dino-waifu in a few years though.
Other: Okita Alter as mentioned above, Gorgon, maybe MHXX. It's hard to justify any of these characters given the infrequency that they're the best choice.
I guess after looking at that list, my order would be: Okita Alter > Fran (saber) > Raikou (lancer) > Jack > Raikou (berserker) > Cuzilla > Gorgon.
That should keep me busy for a while.