I advise you to gradually stop playing FGO, like I did after throwing way too much money at it. This game is the devil for your wallet. It will be hard for the first few weeks, but then you'll get better.
Now, about your account, I think you should make Luna your first 6*, then Kluri. The others bring somewhat less benefits from the upgrade. Use all your skystones for Bookmarks until you have at least one or two characters for each classes in each element, and then focus on improving their CP, even if you have to buy stamina. Also, don't understimate the Banshee sisters. Aside from the green one, they can all be competitive with natural 5* characters.
That summoning session really put a downer on FGO for me... I'm pretty much not going to spend a cent outside of guaranteed summons from now on and just focus on the welfare servants like I intended to in the first place (but I just finished watching the anime Mordred was in and fav VA + waifu reasons = RIP). I did manage to grab a First Hassan from maintenance orbs I got from playing it for ten mins halfway through last year... so I guess that was pretty lucky.....
Yeah I was thinking of making her or Sez my first 6 star, probably go with Luna like you said.
I am in the process of leveling up Carmainerose along with Kiris, Lorina & Lots... though I guess I'll put Lorina on the backburner now because of Luna.
Also I finished story mode and had exactly enough gold transmute stones for 3 ML pulls....
1st = Challenger Dominiel
2nd = Wanda
3rd = Crimson Armin
Pretty stocked about that set of pulls to say the least... had 50 bookmarks left and decided to try and pull a healer in Tama's banner, with my last 4 pulls I got three 4 stars, Leo again (sigh), Cidd & Schuri......
Pretty happy with the units I have, don't feel like I need to spend especially since building characters up in this game seems to have a massive bottleneck. Still got to work on my specialty changes as well as pulling a few more Connections characters......
Going to start saving up from this point onwards for the next limited banner, hopefully I can grab a top tier healer from that sort of banner....
FGO. Oof. I could say a lot of stuff about FGO but folks tend to have to experience it for themselves. I loved the stories and characters but screw everything else. It's not the gacha for me, let's say that.
Grats on Luna. You should be focusing on abyss and lab at this point. Lot of great gear in both that carried me til this day.
I'm kinda on a fate kick at the moment, since I watched the Grand Order special, Last Encore and Apoc the last couple of weeks so of course Nero is my waifu, Mordred is awsome etc..... I'm only playing 3 gatcha games right now, FEH which I'll never drop, Epic Seven which I'm playing the most right now and FGO which is in a distant 3rd after that summoning session.... I'll probably drop the game if I don't pull Caster Nero with free quartz (so high chance lol).
Yeah I'm going to hit up abyss and lab from this point on, cheers. Seems I've pulled some good pvp characters too so I'll focus more on that as well.