ok akhee you say baarakaAllahu feek if you're gonna stop at that, if you were adressing a male or female.
If you wanna continue and you're adressing a female you'd say baarakaAllahu feeki ukhti (mathalan, for example)
If you were adressing a brother you'd say baarakaAllahu feeka akhee...
As fo baraakaAllahu feekh? i've nevr heard of it, so you'd say the kh, for instance the same way you say khayr?
If thats the case, its incorrect, if its the classical arabic you seek.
unless its a way some arab countries speak? Allah knows best.