Yeah teambuilding is uhhh... confusing and a lot to unpack. Usually having a single good team isn't very easy, so if you go asking people for help with teambuilding it can help to say something like "I want to reach S rank on Koi ni Naritai Aquarium on Advanced" instead of just "help me build my team". People usually build teams for each song, but there are some general rules to make a good team. This message is gonna be a long one but I'm gonna try to help out as much as I can and help keep things easy to understand.
Some basic info beforehand:
- Appeal is the most important stat in the game, it determines how much voltage (score) you earn every time you tap with that card. The higher your appeal, the more voltage you earn. Vo cards usually have the highest appeal (but not always) and you always always benefit by having more Vo cards.
- Limit breaking cards is always incredibly helpful to raise their stats. Cards at higher limit breaks will always be better.
- Every song will have a debuff that will lower a certain stat (usually appeal) of all the cards in your team that don't match the song element, usually by 20%. For example, It's our miraculous time will lower the Appeal of all non-Smile attribute cards by 10%. You can always check this by looking at the Tips menu for a song, along with any other useful information about the song. This is usually why people build for certain songs rather than just overall, so they can fill their team with Smile cards to avoid that Appeal down debuff.
- If you're getting insight skills from doing training, try to get as many with a blue triangle in the corner as you can. These skills are passive and will always apply, instead of pink-cornered ones, which will only activate usually about 30% of the time. But skills in general are super important, and they help out a bunch. I'll be going over some I find really helpful so you know what to look for.
First thing's first, here's how I'd make a general team. Cause the auto formation kinda sucks, not gonna lie. Here's the team I've made, so let's go over everything and break it down so it's easy to understand.
https://i.imgur.com/ZuiGP0w.jpg
For this team, let's pick one colour of strategy to be what we call our "Frontline". These are gonna be the girls with high appeal you'll use to score as much as you can. I usually like to use red, because it's easy to remember, and as long as it's not green (for a reason I'll go over in a little bit when talking about our green strategy.) Let's put your two cards with the highest appeal into that strategy. I sorted my cards by appeal and found mine were Ayumu and Maki.
https://i.imgur.com/HFRLIpb.jpg
Now that we have those two in, let's put in a card with a heal skill so we don't have to switch off of our scoring strategy to heal. Usually Gd cards will have a heal skill, but I like to use this Mari because she has a heal skill, good appeal, and she's also Cool attribute, just like Ayumu and Maki.
https://i.imgur.com/Nti1wnS.jpg
Now we have our scoring strategy. We have 2 cards with high appeal so we can get lots of voltage, and one healer to keep us healthy. Let's move onto our blue strategy!
The blue strategy begins what we call the "Backline". These are cards we won't often switch to, but can still help the team in other ways, mainly their skills. Let's start by putting this Hanamaru card into our backline.
https://i.imgur.com/cClddoB.jpg
Now, why are we putting Hanamaru on our backline? It doesn't matter that much that she's also Cool attribute since we won't be using her for scoring, the Appeal debuff doesn't matter much for her. However, she has some great skills that can benefit the team. First of all, she has an Appeal+ Same Attribute passive ability that'll raise the appeal of every Cool member on the team, which will help out the frontline a bunch. Second, she has a skill to gain SP, allowing the team to use SP skills more often. What I like to use the blue strategy for is getting SP as fast as possible, in case there's a part of the song where you have to use a SP skill. Then I can just switch to my blue strategy to get SP as fast as I can. Putting cards with skills that earn SP, or Appeal+ All passive abilities are ideal for the blue strategy. Here's the blue strategy I put together. Kotori has an Appeal+ All passive ability (and I've got some limit breaks on her so the passive is a higher level) and Setsuna has a great skill that increases the SP gauge gain for the next 10 notes. Now for the green strategy!
The green strategy is all about Gd cards. It's where I'll put my healer, my stamina stick, and my cleanser. We already know what a healer is so let's go over what the other two terms mean. A stamina stick is a card with a really high stamina stat. Its only purpose is to go into your team to raise your team's stamina. A cleanser is a card that can get rid of a song's appeal debuff. The best cleanser in the game currently is Angel Riko, so let's go over her cleanse ability.
https://i.imgur.com/9Hs5UjA.jpg
When you have this Riko in your team, there's a 30% chance for her ability to activate whenever you switch strategies. If it goes off, it'll negate all lowering effects, such as the song's appeal debuff. This is incredibly important and you want this skill to go off as fast as you can. You start every song in the green strategy and can switch strategies once before tapping any notes, so it's possible to start in green, switch to red right away, and have Riko use her cleanse ability before tapping any notes. This is why I say to not have your frontline in green strategy.
An important thing to note is that Riko can't cleanse "base" effects. If you check the info for a song and the debuff says "base Appeal" instead of "Appeal", Riko's skill won't do anything. It's still useful to have her in your team however, since even without her skill she can be a stamina stick if you want her to.
Here in my green strategy I have Riko for cleansing, Chika as my stamina stick (Rina has higher stamina, but Chika has an ability passive that raises the entire team's Stamina) and Ayumu as my healer. As long as you've got some good cards with high stamina and use Riko, you should have a great green strategy.
Before I give some suggestions for teams, I wanna go over a helpful tip. It's usually a good idea to put your cards with the highest technique in your middle 3 slots, which are your SP Skill Unit. The short explanation for this is that the higher a card's technique, the more voltage you'll earn with your SP skill. Here's a screenshot as an example where I moved Kotori and Riko into the center since they have higher technique:
https://i.imgur.com/zKpuzhT.jpg
As for your card list, you've got some great stuff currently! Both of your Kanan URs are well known for being great frontline scorers, you've got fes cards like fes cards like Secret Galaxy Kanan, Delightful Waltz Emma, Little Devil Temptations Ruby and some great support cards like Angel Riko, Little Rabbit Ruby, and Lovely Police Kotori.
I'd personally build an Elegant attribute team using these cards:
Frontline: Magical Halloween Mari, Priestess Dance Dia, Little Devil Temptations Ruby
Blue Backline: Snow Crystal You (she has a great Appeal+ Same Attribute passive), Colorful Candies Nozomi (she has an Appeal+ Same Year passive which works well with Mari and Dia), and Present for You Ayumu (who has an interesting Appeal/Technique+ Same Attribute passive.)
Green Backline: Angel Riko (for cleansing), Fashionable Romance Honoka (or any other stamina stick), and pretty much any good healer you have or like.
Hopefully this helps! I love SIFAS and could honestly write a whole book about it, and I hope I could not only help you out but also help give you info on what to look out for when building your own team! What you have is always determined by gacha so it's always fun to look forward to what cards you can get and build teams off them! Let me know if you have any questions and omg hopefully this wasn't a slog to read through haha