Does anyone know if memories for legendaries drop in regular mythic 0 or do we have to do a +2 or higher?
They drop in all dungeon levels actually. The chance of a drop just goes up the higher the M+ you do.
Anyone know what the % numbers are for the levels?
Mythic has a really good chance. Normal and heroic are a hit or miss.
You also need to free the Runecarver on all of your alts, bfpre they can drop.
Rng
Took 33 heroics for one lego and <5 for another
I got most of mine on the first run of the dungeons at M0 or M2. Flash Concentration on my priest, however, I ran 18 times before it dropped and it was my first M3 try.
Memories can drop in heroics as well, although the drop rate is lower. TLDR: The higher you go, the higher chance it drops.
When Shadowlands started, I farmed memories on Heroic 5-man. I delayed going to Mythic 0 becoz I have to get a Legendary first before moving forward. And Heroic-5man was way easier than Mythic 0 back then.
There were 3 hunters on my 5-man group when Memory dropped to me. The other 2 hunters left the dungeon as soon as we killed the Boss that dropped it.