Out of 8 Diadem runs, 4 easy, 4 mediums, I've seen maybe 10 i210 items drop *at all*. 2 were caster items (I went as SMN), but since I wasn't with a premade, someone without the class got the item.

So far I got a i210 garbage 'of slaying' earrings, and i210 decent DRG pants. My Lancer is lv 25.