I don't actually know. That's one of the reasons I'm wondering what's tickling other peoples fancy. I'm extremely happy with my current lineup which looks more or less like this...
I'm going to grail and max fou Moedred once I get everything else squared away. And I've got a lot of skills to level but in terms of servants. I don't know.
May the gatcha goddess deliver the dark queen of the underboob unto you.
Pretty nice team there, good job Jammin
As for who you want to go next, why not take a look what will become available with time:
http://fate-go.cirnopedia.org/guide_faq.php#nav (Servant List near the bottom)
The ranking isn't the most reliable from what I know, but I know you don't really care much about that anyway, so that might help you to find your next waifu XD
I think you have a good idea what I'm going for already, but in case you wanna know:
Top priority: Jalter (willing to throw quite a bit of money at her, but I hope I won't have to go through that, because it's a painful process

pepe)
High priority: Nero Bride, Nero Summer, Artoria Pendragon Maid Alter, Titoria Alter, BB (though she's a freebie, thank god), King Hassan
Highish priority: Meltlilith, Passionlip, Medusa Gorgon, Artoria Summer
Mid priority: Cu Chulainn Alter, Emiya Alter (not a big fan of either design, but I want dem Alters), Emiya Kiritsugu, Ishtar, Mysterious Heroine X Alter (because I want all the Artoria Alters and dem Light Sabers), Ozymandias (bc supposedly best Rider in the game), Musashi (bc supposedly best ST Saber in the game), Angra Mainyu (bc of the Fate fanboy I am)
Doesn't necessarily mean I absolutely won't roll for anyone else, but those are my picks for the moment, everything else seems negligible.
Starting with highish priority I'm probably willing to invest some money. Starting with high priority I will be really salty if I don't get the Servant. Not getting Jalter isn't an option... until I face reality, because I sure as hell ain't investing hundreds of dollars for a single Servant.
It's kind of fascinating how far this rolling hell can get you, I ended up investing 150$ for Salter because I got more and more desperate with each pull. It was my absolute limit (I had planned on 100$ being the limit but yeah... I gave in at the second to last day of her rateup), and thank the gods I got her during my last roll lol xDDD
With that being said, I will definitely need some luck if I don't want to end up broken and insanely salty. Everything from Highish to top priority is almost completely made up of 5* after all, besides Passionlip and Titoria.
First of all, congratz to you
@Jammin for obtaining Moedred. You truly deserved her for the patience as well as effort you spent in the game. Getting your hands on your most desired unit is a great feeling.
My eyes are - same as with nii - on Artoria Lancer Alter. She is an outstanding Lancer Servant and as a 4*
easier to obtain than a 5* Lancer who probably doesn't even come close to her. I consider to do a lot of multirolls to get her. I'm currently sitting on over 330 Quartz and 19 Tickets. But I will keep some. If we go by the JPN schedule, the next pickup summons which pique my interest are:
- Saber Wars with rate up on Nero and Salter
- Nero Bride pickup summon for obvious reasons
- and after a long gap, we will hit the everlasting glory of the Nasuverse, Jalter!!!!!

So here is my dilemma:
If we are being realistic, I won't have much Quartz after the Artoria Lancer Alter pickup summon. I'm going to spend approx. 210 Quartz and all my tickets there. After that, it gets complicated for me. As an Okita owner, it's difficult to spend Quartz on other desired Sabers such as Moedred, Nero, Nero Bride and Salter. But who doesn't want to own every Saber waifu at one point? The problem is that I don't actually know when Jalter will be released in the NA version. If she appears sooner than expected, I will be out of Quartz if I spend most of them in the pickup summons mentioned above. Granted, I would buy Quartz in the Jalter event, but my limit would be one 86+54 Quartz pack, not more. That's 5 multirolls? Certainly not enough to have a reasonable hope for a 5* Servant, let alone Jalter.
So, I'm thinking to play it safe, keep 120 Quartz after the Artoria Lancer event and don't pull for Nero Bride or in the Saber Wars. Considering I will collect a lot of Quartz along the way, plus the willingness to buy a 86+54 Quartz pack, I'll end up with a realistic chance to pull a 5* Servant.
Any advise from you guys?
I hope you will show yourself on Slack, so that we can roll together
Honestly, I say see how the Titoria rolls will go first. If you get her with a ticket, all is great. Then you can defnitely do some rolls for Nero/Salter, like 2 or so. Then you will still have enough to have a reasonable chance with Nero Bride. Not to forget that the game will give you more quartz, even if it's not an insane amount xD So if you use up all your quart for Nero Bride, you roughly would have one month to one month and a half until Jalter hits.
So even if the Titoria rolls turn out well for you, it's time to set priorities. Rankings honestly are secondary besides some exceptions on the upper and lower scale (bc some Servants simply are godlike and others simply are shit, even if you love them), so go for the Servant you really want to play with.
If we go by a rough power/usefulness ranking:
1. Jalter (just awesome, remains one of the best Servants of the game)
2. Titoria Alter (better than her 5* non-Alter version lol, still considered the best 4* Lancer in the whole game, really good unit for farming)
3. Nero Bride (supposedly the best ST Saber in the game, until Musashi comes a year down the line, though she remains great)
4. Salter (great for farming and awesome to have right now, but there will be a bunch of Servants who can do the same as her later on, and are potentially better overall)
5. Nero (a good Servant, but nothing really stands out)
I hope that helped, the rest is up to your taste in waifus

Getting all of them will require a really high amount of luck, at least without money. That would be so much luck that I would curse you to death... but it's not impossible. Thing is, you can save as much as you want and still fail to get Jalter, so I would say at least try to get 1 or 2 Servants of those you want before Jalter comes. That, or be ready to throw the game anyway if you still don't get Jalter.
Though it will probably turn out like this, at least for me: