If Warrington line up as they did against Leigh, Leeds need to take them on down the middle. The drop off between their starting middle unit (Hill, Clark, Sims, Westwood) and what's to potentially come off the bench (Cox, Dwyer, Westerman, Philbin) is pretty significant.
Would imagine they will want to keep that starting front row on for as long as they can, so keep going back at them and taking some energy out of their legs early on. Might not be the most attractive way to win a game, but it's likely to be more effective than throwing the ball around and turning it over early in the tackle count. One of the reasons I'd start with three recognised props.