Guild Wars 2

As far as i remember those orbs only spawn close to where you enter the room, so sticking close to the statue(behind it are pretty safe spots) will give you plenty of time to see the orbs coming.
A 2nd and way easier method is asking some people to help. There is a safe spot in 1 of the corners next to the entrance where you can climb some debree, from there you can still range the mender a little but are outside of any attacks that might KB or KD you. Then just sit and wait till your friends destroy the statue.

20 charged quartz>1 a day>account bound mat