I am not sure which of these are rank 1 or 2 buffs, so I am not sure which apply to your limit or not, but:
Cleric 1: Safety Zone
Priest 3: Aspersion, Monstrance, Blessing, Revive, Stone Skin
Sadhu 1: Out of Body? (really not sure if that counts as a buff or not, if it is it seems more like it would be a Rank 2 buff)
Druid: shape-shifting, telepath? (again not really sure about these)
Plague Doctor: Healing Factor, Bloodletting, Beak Mask (this seems like it would be Rank 2), Fumigate
So, with your build you have 9 - 13 buffs (although some may be rank 2). You need to also take into account that when you are in a party other people’s buffs may overwrite yours. And you need to take into account that your party members may be Archer or Wizard class which will not be able to get all of the buffs you try to give them.