Depending on what you are doing the equip for 75 RDM can be various. One of the best things to have a 75 RDM for is aquiring merits. In a merit party no one is really going to care what your wearing if you can keep haste on all the melee, keep them from dying, and keep your mp up. Composure and refresh are your best friends(so is ballad too).Errant is an excellent set for INT build, but you will most likely only use the hands, body and/or legs. The Wise set is also good and doesn't have a minus stats so it can be used for a melee RDM.