ok..heres a few ideas not going to take long talking long just going to give the ideas right now ^^
1:rikaduo clan or w.e you call it:
gedo mazo stealing and sealing system:...prety much gedo mazo chould steal and seal bijuu..ik it seems a bit op...but when you think bout it you can get juubi by sealing all the tailed beats in you...but not saying anymore then that you gusy know what i mean...but this sint the only thing its capable of since its also a sealing type jutsu in the filler that guy used chkara chaisn almost like the gedo mazos to to try and steal fuu adn gaaras tailed beast..but when neji broke the chains hold..they wasnt going to go awya they were going to continu looking for chakra adn they turned on the user..so i belive they cna also be used to seal someones chakra to keep them from using jutsu till the persion dies adn respawns
*New* gedo killing a tailed beast with gedo mazo wont make you the tailed beast host instead the gedo mazo stores the tailed beast so you wont have to worry bout having a tailed beast stolen..on top of that i belive it should be like the otehr gedo mazo if you have all tailed beast sealed in you you can fuse them
path summonngs: now in anime paths used bodys dead bodys so you whould need to stand over adead body and use six paths then you choose what path you want that body your going to use to be
*New* zetsu: black zetsu should have 2 new jutsu absorb chakra and steal tailed beast while atached to a host it can walk up to a tailed beast host and steal there tailed beast zetsu user gets the tailed beast
2: edio tensei a.k.a orochimaru kabuto and 2nd hokages reanimation jutsu: heres a good thing i think might be good
1:a coffin for storing your edios instead of the edios just vanishing when using edio revert they go in your inventory as a coffin ofc you have one coffin for storing all your edios sinces in most games like ultimate ninja 2 theres a big hand coming out of it whichs signifys there not normal but anyways if you want to summon your edio again simply go to your inventory and click the coffin then choose what edio you want to bring out
4: medic: ms whould be good as well as izanagi also needs senjuu dna for use of izanagi in the arms can have 10 in the arm dont need senjuu dnda to use izanagi in the eye and choudl also replace your curent eye jutsu like the rinnegan with sahringan works with any eye jutsu want a dif eye jutsu just go adn steal one adn replace it but youll loose the old eyes jutsu and it will be replaced with the new one and its jutsu can only ahev one eye at a time obv then theres dna implants as satted above you will get senjuu dna doesnt need to go with sharingan or anything and theres oro dna
if i think of any other tyhings for medics or if you do ill let you know or you can just reply to this topic..i think medics needed more specil stuff like more abiltys to go with eye implants like taking one out adn replacing it with a dif one and dna implants as well as the combo izanagi of eyes in the arm adn senjuu dna
4: clans
1:puppet clan: sasoris konkoros etc..master puppet people
you can check narutowikia for puppet jutsu sasoris jutsu are a bi dif then konkoros..idk if it was the result of him being a human puppet but one jutsu i think they should have is turning dead bdoys into puppets the puppets will have all the jutsu they ahd during life so in a way its like edio tensi oro jutsu
2:juugo clan: now why i think this clan is good is cuz the cs came from them..they should have more jutsu then in kimis games blind spot of the souls..but they dont...you should have part forms of cs like left arm right arm..each of thses have a dif type of use left arm shilsd extending and grabing as well as that chakra jet boosters on the arm which whould power your attack send you flying into the enemy with raw power attack and dmg sent into the enemy right arm whould have axe that pistion thing and absorb which restors hp...ik it sounds like ntfb but this was in the anime then theres cs full form..or if you know its real name when juugo uses it sage mode
thats all i can think of for now..i hope you can read thsi and probly add this good stuff..it whould amek me happy if you whould..but its up to you..if theres anything youd like to chaneg in this just reply to it like any jutsu stuff
5:*New* tailed beast i belive you should loose your tailed beast after dieing a certion amount of times or at the very least there should be some sealing jutsu for some clans