My AIs are very bad boys who won't throw any grenades. How do I make them do it? You better tell me before I spank them all.

Hmmm... >.> I don't know so you better start bending them over. XD

Open you actor variant with guerilla, go to GRENADES.

A little exemple :
grenade types : (select what you want)
trajectory type : (select what you want)
grenade stimulus : (select what you want)
minimum ennemy count : 0
enemy radius : 0
grenade velocity : 8,5
grenade ranges 2.8 tp 12 world unites
collateral damage radius : 2
grenande chance : 1
grenande check time : 0.5
encounter grenade timeout : 5

Grenades: Most of the grenade parameters are self explanatory. I'll cover the important ones.

Grenade Velocity: This number must be a positive whole number in order to get the AI to throw. When you extract an actor variant, this normally isn't a positive whole number. You'd use around 9 to 10 for marines and grunts, and around 12 for elites.

Grenade Ranges: Similar to Desired Combat Range

Collateral Damage Radius: The AI won't throw the grenade if there's a friendly unit within this distance of the planned grenade throw.

Grenade Chance: How likely the AI are to throw grenades.

Grenade Check Time: How often the AI check whether or not to throw grenades.

Encounter Grenade Timeout: How often the AI must wait between grenade throws. This goes for all actors in an encounter. So if (list_get (ai_actors encounter) 0) throws a grenade, (list_get (ai_actors encounter) 1) cannot throw a grenade until the timer has gone up.

Alright! Brute Stalker with firebomb grenades, here I come!

HEK + rips tags incorrectly. Use Halo Tag Converter (found on halomaps) to get ai actor variant tags correctly. The UI is a bit funky though which is why its not used as much.