Keep in mind you need both han and roshi for the roshi, han, sailor water team to work. This is the team several people, including myself you should go for since you got sailor sakura before unlocking kage treasure. It's a good team for f2ps who spend their resources wisely. We aren't saying choose only one. The team you would be having with han would be only temporary until you get roshi.

I don't know the skills you are using for the the sailor, kimimaro, kabuto team but it should that your main should not be a damage dealer. The skills you should have is 3, 2,3,3,2 with the monkey summon. If you are confident with the healing, you can switch healing tips for neurotoxin. The most important part of the skill for that team is the poison tai since you have sailor's standard attack, which spreads the poison to the whole lineup and her attack increases every time she is attacked. The damage you should be worrying about applying is the poison. The strategy with the healer + poison teams like yours is to create as much damage from the poison before the round 10 is done. You still get the win if you have more health than your opponent, which is why these types of teams are viewed "boring to watch" but it's effective.

Since you started late in the game, you did not have a chance to build enough seal scrolls and go for mei. This is a ninja I would recommend to add to your temporary han lineup while you wait for roshi but you shouldn't go after mei before going for roshi since getting mei is only a 1/8 chance for every 60 pull while roshi is a guaranteed 180-210 pull.

It is a very terrible decision for you to go for roshi if you do not have a high power compared to people around your level. Your power is the average in your level range so your roshi would die really fast even if you have 3 healers. Since you said you only have basic ninjas + sailor, I would try just replacing kimimaro with han and if you have the gold slug summon, these are the skills you should have: 3,2,1,3,2. If you have the gold bird, replace the 3rd skill with the 3rd choice rather than the 1st one. If you have the god rhino, replace the 3rd skill with the 2nd choice. If you have neither of these summons, just use the purple bird with the same recommendation as the gold bird.

Also, don't listen to anyone who just provides you advice or recommendation if they don't understand your situation and what you can work with since some players just say what they are experienced with based on their ninjas or just want to promote their youtube, regardless if their advice is helpful.

What do you mean normal fights? If you're talking about arena, it's tricky to say if any lineup works or not since initiative determines who wins the match most of the time. Like I said, the majority of damage you are going to do is from the poison not from the ninja's mystery. You can get a gold summon for about 28k coins in the summon shop in you want to save from doing events. I would just leave the team you have the way it is since kabuto's abilities help increase the defense and resistance of kimimaro, in which you need to do as quickly in a match. Kabuto's clones also help out with the poison stacking. Not sure if you realized this but this team is not meant to be played in auto. since you want to spread out the heal mysteries of water main and sailor so that you c*e at least one heal per round rather than wasting a heal if your team is at max health.

Replace kimimaro with han because with han's mystery, you'll be able to remove buffs, shields, and some passives like immunity so you'll be able to stack the poison. Currently, if you fight a lightning main with the root of the warrior passive, this would make 3-swordsmen on his teams immune to your poison for only 2 rounds. If you have han and use his mystery, you will get rid of this passive, which would allow you to stack poison.

Focus your seal scrolls on han then roshi. After that, you can spend you seal scrolls else well. You have to * a lineup since certain lineup work well with certain ninjas. If you decide to replace one and add another, the effectiveness of the new lineup might decrease if the new ninja is not able to work well the team. Also, you only have a 1/3 chance of getting sage naruto for every 60 pull in the sage treasure so you might end up wasting your seal scrolls on getting a ninja that is not sage naruto and delay you in getting han and roshi.

Bond is technically like arena but worst for the majority of players and is not suitable for players who just started. You should be looking at only at their level but look at their power.