Assuming Rondon is gone, that leaves us with J-Rod and HRK. I'd say we need two strikers to come in, preferably at least one of them being first choice, preferably two. I don't mind keeping HRK as squad filler if we have to.
I can totally see us selling Rondon in the next day or two, then J-Rod at the close of window and bringing in Gayle on loan and some kid from League 2.