Which commentary on the MMK should be studied first? I am currently casually reading various things, and Ocean of Reasoning is one of those things. I've began to feel that I should pick a challenging reading to focus on, but I'm thinking I might want to read Ornament of Reason before Ocean of Reasoning.

Is one or the other traditionally studied first? Or is there some other commentary before these that I should study? I am already well acquainted with the Mūlamadhyamakakārikā itself.
I suppose it depends on which lineage you draw your water from. Ocean of Reasoning is a Gelug text, as is Ornament of Reason (I think?), while in Kagyu they study Madhyamakavatara, a relatively early commentary by Candrakirti, with subcommentary by Jamgon Mipham.