When I dropped some tips on my beloved Fire Main, Scarlet Blaze, I got some positive feedback about it.
So... this is just a thread in which I'm going to occasionally throw some tips about Fire guy, how to use him, what works well with him, and what does not. Oh, and points I put in this starting post are copied from a lineup help thread (just rephrased to match the topic here more)
And it's possible that I will be changing a format of this quite a bit in the future, but, we'll see :D
If anyone feels like leaving a suggestion, then go ahead, I always appreciate some advice myself :v
Any questions? Leave them below :D
And..... yeah, let's get on with those hints and tips :D

1. You have to find yourself some different teams for Ranked, Survival, Arena, PvP, Instances, Nine Tails, Strong Approaching, etc. There is NO UNIVERSAL TEAM that will cover all of that, because the battling style of each and every one battlefield is different, and you need to fit your team into battling conditions.

2. Try to get full combo from the team you are using. The best way you can do it is checking the amount of chase skills in your team (activated twice count as two) and add 1 to that. If the teambuilder (http://*.qq.com/tool/huoying/mnq.htm) gives you max combo of this amount, you are good to go. (golden summon for main count as 2 chases, whereas purple and blue, are just 1 extra chase. Main can have 2-3 chases up from lvl 50)

3. Getting the ninjas for your lineup is not the only thing you have to do. You must place them correctly, so they do not collide with eachother's chases, skills, and they DON'T DIE 2nd turn :v Characters that have lower defence need to be shielded, bulky ones want to be in the front, and balanced are fine in the middle.

4. Characters that have "clones" are useful as a "shield" for your team. Naruto is a good example, however I feel like guys with Mystery summoning clones fit the role a bit better, like Sai, Kabuto, Kankuro (kinda, but still), and let's not forget about so called, bulky clones, like those of Kakashi, Naruto, main character, etc.

5. Raise all your 1* 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 (Gaara too, but most people that have him, have him at 4* anyways) 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. Get your daily main character frags. Do not skip that, unless you are sick or sth. That is possibly the most important daily mission of all, to get those 3 elite instances (Sweeps count too). I started playing I think about 1st or 2nd day of the game release on server 1, and now I'm 4* with 74/200 (look at the date of the post if you read this in a future xD)

7. A quick list of characters from the back of my head 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:

-Hinata is a powerful ally, especially for f2p players. She NEEDS to be in first line though, 'cuz her mystery works best there.
-Sasuke is a glass cannon. He need to be covered by at least one other character, and/or clones
-Kabuto's Human Experiment raises stats of characters with Curse Mark passive, like Kimimaro, Tayuya, Anko, SakonUkon, Kidomaru, etc.
-Karin is a great healer for full combo teams with her 2x chase. Also, poisoning IS a powerful debuff.
-Kankuro works great at 3* with his AoE. HOWEVER, for the Fire Main GNW Kankuro is a beast with his Sasori puppet. (look next line)
-Passive Mirror Return buffs the damage you do to ignited enemies. Now you know what are you looking for in a team.
-Hashirama is just an ultimate buffer for any main. His passive gives you 5 rounds of buffs, his mystery gives you more buffs, and guess what. He heales himself and immobilizes... Oh, and interruption chase is a thing too. (I want him so badly xD)
-Tobi can be ressurected by Chiyo after using his passive. (He is still at the spot, even though he "runs away" and is invisible.)
-Jiraiya (mostly Sage Mode) is also a powerful igniter, any igniting character is a friend for Scarlet Blaze.
-Kakashi is NOT the best ally when it comes to your team, howeve he is useful for SA, and when you lack a repetetive mystery that doesn't cost too much chakra. His clones comes in handy too.
-Ino is a teambreaker if you fight against combo teams. Only things you need are Seal of Red Lotus and Feather Illusion
-Shikamaru has a very powerful mystery if used right after Fire Main's Seal Mystery (IGNITE!!!). Ino is a nuisance in that kind of team though, because her chase takes off immobilization.
-Itachi is a great support character in a team that uses a lot of chakra on skills (Gaara, Sasori 100 puppets, Kimimaro, etc.) Also, with Fire Main and Tayuya he is one of the 3 characters currently available in-game that can cause sleep. (if I'm wrong, then correct me, but so far I haven't seen any other playable sleep characters)
-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.
-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. Nine-Tails event, here I come!!!
-Dragon Flame jutsu can be activated 2 turns in a row before cooldown kicks in. That's a reliable combo starter mystery.
-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. (any other main as far as I'm concerned, but y'all came here for the fiery guy :D)
-Red Lotus Seal (lvl 55 (?) mystery) is an amazing addition to your SA team. Great for trolling as well.

Oh yeah, one more thing about Fire Main, just from yesterday:

I discovered he is a great solo killing machine, when testing it out with a friend of mine. She is lvl 51 with about 7k power (sth like that), and my main was a bit over 4k power atm of testing. Her team was wrecked by Fire Main on Auto, even though she's Water. The difference in levels is great, but the difference in power... whatcha think 'bout this? If you want that lineup, I'll post it later (If you can even call it a lineup, more like talents breakdown)