Warrington wins a UD, his rhythm is just to hectic for Leo to deal with, it would resemble the first Frampton-Santa Cruz match, although it'll be close and competitive throughout.
Selby isn't exactly an elite fighter, though the Frampton win was very good, hell Warrington beat Carl better than Santa Cruz.
I actually think that Warrington still has more to offer in terms of improvement and right now, his confidence will be through the roof. He absolutely manhandled a fully fit, well conditioned and confident Frampton for much of their fight and I only see Santa Cruz winning by getting a home cooked decision. If it was on neutral turf or at Leeds, Warrington all the way. I fancied him strongly against Selby and narrowly against Frampton and have been mightily impressed by him in both fights. Right now he's an absolute handful for anyone in and around his weight class.
I'd say LSC. I don't think anyone but perhaps Russell Jr can beat LSC. I'd like to see Warrington vs Valdez. That'd be a proper fight.
Warrington got a gift MD against Kiko Martinez so by our Man-who-beat-the-man rule it should be an easy win for LSC. BUT CF also won twice against Kiko and he got beaten by Warrington, so... I think LSC would win an UD against Warrington, but it wouldn't be a one-sided fight.