Luque is so hard to back considering the brain-bleed and how he looked against Buckley. The RDA fight showed new wrinkles with his grappling (offensive & defensive) but even in that bout his striking was very suspect and he looked gun-shy & vulnerable.
Nick is, well... Nick. Not much to say, but to be fair the guy was going to war with Robbie early on until he decided he was done.
If Luque has even a remote fraction inside him of the dude who made it to the Top 5, he should win this handily by outstriking Nick (especially with his low kicks) and maybe mixing in a bit of offensive grappling. But I hate how live Diaz feels lol.