It's a well known fact that killing Vyragosa is what will spawn TLPD and that Dirkee is not related to her spawn timer.
Also, there can only be one rare elite in any one zone at anyone time.
Now, I've seen tons of posts that says her spawn timer is anywhere from 6-12 hours, and that its a chance for her to spawn. In my finding its more of a 12+ hour spawn time with almost a 100% spawn time within 24 hours.
I have also read the TLPD itself can spawn directly after a Vyragosa kill as her death triggers a random roll that sets if TLPD will actually spawn and when it will spawn. So encase, she is a rare spawn, of a rare spawn.
For the actual hunt my weapons are:
NPCscan - Scans the screen, chat logs, global, and combat logs for any rare spawns.
NPCoverlay - Shows the spawning location of all rares in the area and their pathing locations.
Silver Dragon - Similar to NPC scan with some other options that are more customizable, it's not needed but kind of a redundancy check. I'd rather have 2 programs running in case one fails to pick up rare spawn and someone else snags the kill.
Custom Macro - I've seen tons of macro's out there and this in kind of a culmination of them. Most have some sort of self whisper tool which is a waste. I'm using the kiss meathod on this. Keep it simple stupid.
/script PlaySoundFile("Sound\\Creature\\Ragnaros\\Ragnaros Slay01.wav")
Anti-afk tool - Whatever you find easiest to work that well, works.
Where to hunt.
Now first off, you need to know where your prey hunts and you need to lurk in the right spot.
So here is an overlay of what we are looking for.
I personally prefer to sit over Bor's breath field looking into Valkyrion
Also, be prepared to waste a **** load of time, she isnt called time lost for nothing.