[Mark of the Champion] works considerably well if you have not had the best luck trinket-wise. Naxxramas is a pretty docile clear if you can convince your raid to plow through it. It's a guaranteed trinket, that's on par average AP-wise to the
[Berserker's Call] (not including cooldown stacking however). You can also get some Sapphiron shoulder enchants while you're at it, and a nice dose of nostalgia.