If you half dosed both products you may still be getting enough Laxogenin, but only half a dose of Epicatchin.
Better to combine half dose Transdermal Laxogenin and 75mg oral Laxogenin, plus a separate dose of Epicatchin, imo.
Unless the deal on the stack was really good and you could run them both at full doses
Edit - Time for me to get glasses - It's Ecdysterone not Epicatchin, still, I wouldn't want to half dose it.