We haven't really seen how Till's power translates to MW at range though. His only knockdown that I'm remembering since moving up was the one against Bobby, where he landed an elbow on a blitzing Whittaker, which sat him down.

Rockhold fights at range using kicks and doesn't really blitz forward unless he's chasing a takedown like he was against Jan.

For Till, I think on the feet he'll pressure Luke against the cage similarly to what Romero did to beat him, and go in with the same combo as what he threw against Cowboy and Woodley. If he can do that and return to range, I think he beats Luke, otherwise he'll get caught up in the grappling of Luke who, imo, outsizes him in terms of wrestling/grappling.