Nope. Deadpool takes it with low difficulty. Ra's has few impressive hand-to-hand combat feats. The best he's done is hold his own against Batman and Nightwing, both of which Deadpool can replicate with further success. He's most impressive in terms of swordsmanship, and even then Wade has him beat.
Stalemating Blood Wraith and Black Knight, both of whom are renowned sword-fighters in the Marvel Universe.
Easily defeats the self-proclaimed "best swordsman in five continents".