Add me on steam, I'm on usually most parts of the day. Currently HR 51.
I think this link works to add me but I have no idea with new steam overhaul
Question, how do you get threat level 3 investigations? I have yet to get one, in fact, I don't have many threat level 2 either. Any specific way I should be farming these?
Lvl 3 are Elder Dragons, I'm not sure if they drop the right tracks before you're HR49 though. Like they appear blue as usual, but they seem to be normal HR tracks instead of tempered. Once you're at HR49, I think any of them should drop. It's best to use the HR49 unlock quest to farm Kirin tracks for a bit and get a couple of investigations, so you can get started. After that I haven't had an issue sustaining elder dragons, I just keep getting them from breaking parts during the fights and picking up a couple of things.
For tier2, you can follow a Diablos around during an investigation and it gives a fair amount, it uses to be you could afk for 30mins then pick up hundreds of tracks but pretty sure they nerfed that cause the tracks disapear over time now. Similarily though once you have a few to make a base, you should keep getting more from hunting them.
Otherwise, check youtube for routes to farm, especially in wastes and elder's recess, waste is like, teleport southwest, walk out to check for bazel tracks, if not here teleport to diablos area, always a diablos track in front of where you drop into the room, then a black diablos track in the room further down where diablos can enter the sand walls.
For elder, you basically run around on the Uragaan path in the caverns then into the lava area, there's a bunch of blue tracks there. Once you collected the tracks you have to leave the area and come back for them to refresh. Once you get a couple of investigations do these to get more out of them, then it should keep going that way unless you get really shitty ones.
Also investigations pop based on your research level of the monster, so you want to keep raising that. It goes up naturally when you fight them though, just make sure to cash stuff in after the mission as I'm not sure if it keeps saving progress or if it just stops until you unlock next star(like when you talk to the old man and he says new information for this monster thing).