If we are talking about hitting the normal 6K > 2P link on standing Chipp, I can assure you it combos, it's just a really tight link (1F most likely). As for Slayer, I don't think it works, because it whiffs the 2P like against Sol.
By the way, I tested the standing link on the entire roster:
Works on:
Leo
Sin
Faust
Ky
May
Chipp
Potemkin
I-No
Axl
Bedman
Doesn't work on:
Millia
Sol
Elphelt
Slayer
Ramlethal (doesn't whiff though)
Venom
Zato=1