Ok, first of all
bout the mix ups question
when you’re mixing up an opponent, the worse thing you can do is become predictible, people respect genei jin cause of its randomness
what you have to do is give a good mix up of highs and lows
I cant really tell you what to do since there is no mmm whats the word?..script
it really depends on your opponent, now lets see an example
for what you’re sayin it seems they always expect you to poke like crazy whenever your genei jin’s on
two words for you: Command Grab
and by the time they are waiting for a command grab
pretend you will do that and replace it with a poke (like, instead of walkin a little to command grab you can walk a little to s.Mk launcher and fuck them up)
and whenever they dont know what to wait for they will probably get desperate and make an uppercut or something so let them fuck themselves
if you teach your opponent how to respect your genei jin, you will see how they will runaway whenever you have meter
now bout your other questions
after the s.Mk there are tons of stuff you can do
what I do mostly is this
s.Mk, genei jin on, short dragon kicks, walk a little, st strong, hop kick and juggle them to the corner acordingly
now, for the genei jin to combo after a c.Mk , the Mk has to be real meaty, its safer to do it whenever they dont safe fall from a throw or a dash punch
whenever you get this situation do this
c.Mk, genei jin’s on, c.Short, Genei Jin Combo
after the c.short it really depends on what part of the screen you are
it can go from c.short, st strong, f+fierce, corner genei jin combo to c.short, st strong, medium shoulder, shoulder…bla bla bla
just practice