All depends on the day and times really.
Think we had 12 online 2 days ago, usually fluctuates, alot of people play alts when raid timers are up etc..
But i can say we frequently do the lvl 40 dungeons when the timers are ready.
We have blood/bile on farm, and cleared all but the last boss in LV, only reason we didnt down last boss was the bloody quest that allows players past the demon wards on ground.
Anyways , you will find we have around 6-14 actives depending on times and dungeon timers.
Alot of guilds will be starting to feel the pinch of having less active players playing, good thing with us, we are seeing a little more activity with players then other guilds are.
AoC had alot to offer, to bad it failed so hard, full pvp is always fun.