Ajmal_Sha_Ns

for domain expansion you can reference of law's devil fruit.An domain where he can literally control everything in it .

yes that was correct he can only switch places with things that have even a small amount of curse energy . but if ms can use curse tools(shown in jjk) he can be like minato. Also he can get a shinigami to battle with him also can switch places with his opponents

i would like gojo as a mentor, although its a bit cringe, but gojo is the person who has most knowledge about space and his 6 eyes can also train mc really efficiently. Also u can use binding vows to make his technique powerful like minato flying thunder god and sasuke rennegan ability

all for one brother quirk is bestow quirk, ofa was created after stockpile and bestow merged

in boys soldier boy's radiation can make supe's into normal human by cancelling vought in their blood , you can try it

true

what makes ten shadow special is it can manipulate shadow, because sukuna is strong he doesn't use that much then mahoraga then it has a domain with cloning with it and quantity nothing too sukuna and gojo at peak only person who can gojo and sukuna are only them i think quality is good quantity . also kenjaku can temporarily make shinigami store giving them more his curse energy u can try it

i think tekkai is not needed when invulnerability , you give him life return -it can help in control body to supernatural level

and using mahito u can modify mc body to comparable to maki or toji also mahito itself is strong and he can heal anybody he touches. then u can also capture rika in latest manga it confirm that without rika yuta can't use copy and in order to copy rika needs to consume so i think copy is rika technic like yuji can sukuna technic because of possesion of sukuna yuta can copy for same reason , then mc can also copy technic and use them for 5 minutes and also rika can increase his cuse energy besides rika is queen of curse who second only sukuna