I'm obviously missing something, but from where I'm sitting it goes like this -

Enemy targets me with AOE
I move a good way outside the AOE marker (sometimes not even stopping just so I can get as far away as possible)
AOE marker disappears
Enemy starts AOE attack animation
I then get hit by the AOE

Now sometimes it's simply that I'm not fast enough - that's OK. But there still seem to be a lot of times where I'm left scratching my head about it

Coming at this problem (probably of my own making) as a WHM by the way - what can I do to improve?