It’s the most compelling playoff series in the Eastern Conference, and Reggie Miller isn’t buying the betting odds that show the Knicks as a healthy underdog against Cleveland. “It’s a pick-em series,” Miller, the former Knicks nemesis and now an analyst on TNT, said Thursday in a conference call. Still, Miller acknowledged that the health of Julius Randle — who remained a limited participant in practice Tuesday because of a sprained ankle — can easily swing the pendulum. “Either way, one of these teams are going to be disappointed if they lose,” said Miller, who is calling Game 2 of the series on Tuesday for TNT.