Hartnell von Durr's page

I just noticed that the Xacarba has improved vital strike... does it use it or?

That's what I thought reading it, but the gm that ran it said they had to be placed in order too. Oh well, no one died so no harm no foul.

The proper order is the light warding disc first,

followed by the darkness warding disc, the daylight
warding disc, and then the faerie fire warding disc.
Slotting in a warding disc requires careful placement
in the panel; even if the PC can reach the panel 8 feet
from the floor (such as being boosted up by an ally or
borrowing the scaffolding from area C1), a full-round
action is required to put a disc in place. If the pieces are
placed in the wrong order, nothing happens;

Does this mean you have to put them in in order (Moon, then Void, then Sun, then Stars) or just that they have to be in the correct slots? Or do the slots not matter, just the timing?