What ballpark range do you need to be to take Shadow Empress down

[MENTION=1638]ultimax21[/MENTION]; I subtracted the DR duration.

That's a terrible way to consider DR, though, at least for timing purposes. You should be counting 80 seconds from when it starts, not 65 seconds from when it ends, since, it doesn't seem to happen that often now, but the icon for DR lingers a bit and if you count 65 seconds from when you stop seeing it, you'll probably attack into the next DR.