As it stands, complete or at least uniform monster hunter armor sets make pretty good character tags, largely because the game is centered around the player's own customizable character. The problem lies with armor sets that incorporate armors from other sets (post #842311 for example).
One possibility could be to make the armor set tags general tags. Another could be creating a general tag like armor_name_(armor) and have the character tag as armor_name_(armor_set) and have the armor set implicate the armor tag.
More input would be appreciated.
Updated by DschingisKhan