I use the data from below spreadsheet maintained by Fazers(granted his agreement) to write a simple addon to show you the gears rank if it's been listed.
And you also can select which phase, which profession/spec you want to see from its config menu.
That helps you understand the gear is more suitable for which profession and spec, and the rank the gear got.
1. TBC Phase 2 PVE EPV BIS LIST - Per Class
Thanks Zentarg and his BiSTracker
AceBIS integrates the paper doll system from BiSTracker, you can check the gears' rank in the paper doll system by /acebis or /ab command
left click and ctrl + left click on the gears show next or previous rank of the gear.