There are 12 "Tier 1" mobs in GoD, 8 of them are in Tacvi (instanced only). All the mobs drop double loot except Tunat who drops triple loot. So this four split generates 68 Tier 1 loot tables.
Edit: My dkp officers have corrected me, sometimes the other Tacvi bosses also drop 3x loot. So it's...