If you havent gotten to your 610 ilvl for heroics. Please check out this guide and do whats needed to get the gear. With all the options to gearing in WoD there should be no reason you arent ready for heroics at lvl 100.
There are rares to kill to get your gear.
There is plenty of ways of gearing without the normal Dungeon Grind. get to that 610 ilvl and I will either tank or dps dungeons with you.
Hopefully I will be either a tank or main dps in raids coming up. With that being said please take the time to research your gear and know where to get it from.