Personally the thing i love most about Far Cry 3 are the Outpost Liberations, so i wanted to see if there were speedruns for that, but sadly it's not an existing category. I think it could make for an interesting challege, so i wanted to propose the idea and give my ruleset for said category:

Timing: The run starts when selecting the option to reset all outposts in the menu and ends after the 'score' for the last outpost liberation pops up, so directly after the cutscene ended.

Subcategories: The Runs should be split into All Outposts and All Outposts Undetected. A no Alarm category is pointless imo.

Rules: The standard rules for Far Cry 3 should apply in terms of mods etc. but no gear restrictions or further rules are neccessary imo.

Let me know, if you think this could be a good addition for Far Cry 3 Speedrunning