As others have said you can do heroics with your 5x team - you just have to start slow (for my group Gundrak secondary entrance boss and eck where the 2 easiest at first) - I think nowadays you could do regular TOC for a while too - or do the last few levels of your level 80s in AV to get honor and get some pvp epics which do help ('cept for the tank; unless your tank is a druid)