1. 1 team for all that is definitely not enough xDD
2. I use very similiar team that you do, but with Kabuto instead of Karin, and a bit different placement, and I also get 9 combo.
3. If you think that lineup is useless, then you must know that this is not a well build lineup. Sasuke is glass cannon, he will die from standard attacks. His resistance is not so bad though, so you want to shield him with other characters. In this lineup, he is alone waiting for a strike from the enemy.
4. Which is the reason you might want to go for Kabuto :D Kabuto can "shield" other characters (clones, not actual shield), and heal up quite a bit.
5. Other thing I might suggest is raising your characters from 1 stars up. You do not want to have them that low, 'cuz they are now dead weight when you teambuild for arena/ranked battle/survival. Haku, Temari and Kankuro are ones you also want to star up to 3*, you will get much more freedom in teambuilding when they get their extra skills.
6. You are lvl 53 and still main is 2*? Work on this, it is going to bring you your doom.
7. ppl that I know for a fact work well with Scarlet Blaze are: Hinata, Sasuke, Kabuto, Karin, Kankuro, Hashirama, Tobi, Jiraiya, Kakashi, Ino, Shikamaru, Itachi. Other ones that I haven't confirmed yet are Gaara, Tenten, Kiba, Haku, Guy, Sai, Sakura, Naruto (only in SA Sai and Sakura save me xD)
8. Now for what you came here for. Lineups. I'm not going to give you them, I want ppl to think themselves when it comes to teambuilding, so here are a few tips I learned myself:
-Tobi can be ressurected by Chiyo after using his passive.
-Shikamaru has a very powerful mystery if used right after Fire Main's Seal Mystery
-Ino is a teambreaker if you fight against combo teams. Only things you need are Seal of Red Lotus and Feather Illusion
-Scarlet Blaze can be a decoy in team, which you will want to be targeted first (especially in team based on combos) He has a 10 combo chase, and c*e Chameleon summon. This way, even if main dies, your combo goes undisrupted, and you get time to set up well.
-Kabuto's Human Experiment raises stats of characters with Curse Mark passive, like Kimimaro, Tayuya, Anko, SakonUkon, Kidomaru, etc.
-Jugo can shield Curse Mark Tag characters, like Sasuke, Karin, Orochimaru, Kabuto, Suigetsu, etc.
-Anko's mystery is amazing when it comes to raising Fire Main's firepower. My Scarlet Blaze has Mood adding Ninjutsu, with Mood scrolls giving him +25%, all lvl 4 ninjutsu magatamas, and that barrier is just adding to the whole. You also get an enchancement of a Fire style Ninja passive, so that's sth you want to keep in mind.
-Dragon Flame jutsu can be activated 2 turns in a row before cooldown kicks in. That's a reliable combo starter mystery.
-Passive Mirror buffs the damage you do to ignited enemies. Now you know what are you looking for in a team.
-Zabuza is a suicide for Fire Main to have in a team. his mystery blinds you.
-Kurenai is not bad of a character as a support, however I do not recommend her.
-Iruka is a beast when teamed up with Scarlet Blaze.
Wow, I just realized that when I get Iruka, I want to try out Anko->Iruka->Fire Main pure offence attack combo. Maybe add Hashirama to that xDDD