None of these are super unique, but I didn't see them when I skimmed through the last thread.
Fighting a gating mob near it's spawn point to prevent it from gating.
https://youtu.be/qS3uoIHTu_c the first mob I kill in this video is a gating mob, but he is close enough to his spawn point to not gate.
Using a pet to keep agro on a summoning mob so you do not have to face tank it yourself.
https://youtu.be/umuVBewCNgY can do this on cliff golems, for example.
Agro kiting, where you have your pet beat on a mob while you keep casting high agro spells. This keeps the mob chasing you, instead of fighting your pet. Doesn't work on summoning mobs.
https://youtu.be/5fsvt1xfuqY did this on an Ice Burrower, which takes forever.
Using a pet to pull mobs through walls in some areas. I think this is mostly an outdoors technique, but you could pull through doors with this as well. Use a /Target macro to get the mob targeted through the wall, do a /pet attack, then keep backing it off until they both pop through the wall or door.
If I remember correctly, the dispel spell line does not have as strict of a line of sight requirement as any other offensive spells/abilities, so you can pull with it in some situations where you normally wouldn't have line of sight. I don't think this works through walls like lull.
Speaking of lull, you can pull mobs with it without needing line of sight as well. Just remove your CHA gear if applicable, and cast lull on the mob until you crit fail.