Do your weapon, secondary, and emblem (WSE) have useable lines? 2 line weapon assuming not Genesis libbed, 2-3 useable lines each on emblem and secondary?
Rounding out your WSE if not already done is top priority imo since they'll be with you for a very long time
Drop rate also really important - esp on heroic, so save some funds for cube sale to roll a few more lines of drop.
Unless pushing your CRA 21* is going to have you clearing new content, I'd prio getting a solid foundation set with your long WSE and making some drop gear
