Quote Originally Posted by Kaelah View Post
I noticed this one when I first started XIV 2.0. I remember asking in my FC chat if mobs ever link because I was pulling Ixali that were mid conversation with another Ixali and the one I didn't pull didn't seem to give a **** that I was murdering his buddy in front of him, I found it jarring after playing WoW for years where if you pulled something like that they would all swarm you. xD
Linked mobs in the overworld seem to be solely based on your strength relative to the thing you're attacking. Fight something of similar level to your own and it's always a single fight. Attack something of a lower level and it will also draw the next closest enemy to the one you attacked.

I imagine it's something like that attacking something draws enmity, and a sufficiently strong attack creates more than 100% enmity and that "overflows" to the next nearest enemy. Do it in a really low-level area and you'll draw an entire pack.

Having your chocobo summoned also seems to affect whether you get this overflow effect.