well you can get for more than 30 days whether you need for f2p or p2w. focus on getting hinata and sasuke 3*.

hinata, fire main, sasuke, karin/kabuto gives a decent combo (unbeatable in starting few levels dont forget to refine, upgrade your stuff and strengthen them regularly)

Join a group get group skills after you reach a good amount of power and battle armor.

when you have moods fire main should be nin+ (def or res can be -ve)

there are so many tips, you need to be little specific.

I am level 75 fire main so i can give you few tips and advice.

fire main, tobi, sasuke and hinata is a good combo team but you will lack healer. Try to get kakuzu too if you are in a good rank.

1. hinata (one of the best tank in game and very good combos with fire main)
2. sasuke (combo maker goes well with most teams)
3. Tenten, Anko, Guy (used for nine tails event with f2p fire mains)
4. Naruto (can be paired with gaara to get his shield)
5. Ino and Shika (can be used in control teams later in game)
6. kankuro (yeah well he is good in a way but gnw version is much better)

yeah i have a ton of info on that: for early game this formation will work fine as kabuto will spam clones to give him little shield and he got double healing.

Always distribute magtamas to each ninja equally then upgrade magatmas, i dont think your server can kill nine tails as of now but soon when it will try to participate every time, because i spent around 50 coupons on a nine tails event and get 25 coupons back (top 20 i believe) + Magatama worth of 15 coupons + tons of xp and coins according to damage, many think it is not a good choice but from my point of view you are spending 10 coupons for many coins and xp.

Team instance is a must which gives ninja tool that upgrades your power. Make friends there to water your tree daily and to assign missions. (i forgot which level they unlock but it is in general)

in case i forgot sai, sakura is needed for hanzo normal sa (when you will unlock battle armor you will do it easy but i only remember for normal and difficult)

try ninja exams and upgrade, stack stamina bottles and use them on monday for double xp for sweeping instances. and as you dont know or know, use this to get some freebies.

http://forum.naruto.oasgames.com/en/forum.php?mod=viewthread&tid=2225&extra=page%3D1

x x x
Sasuke Fire main hinata
Kabuto x x

you might get karin or kabuto from scroll treasure so keep on farming for tobi because he is a game changer for any fire main in early stages.