Go back and read my post then.
Standard action to make an easy check
Move action to make a moderate check
Minor action to make a hard check
It means the wizard can still participate in stuff to a greater or lesser extent depending upon how well the ritual is going, how desperate things are at the moment etc.
Won't bust an encounter. Gives more interesting options than just 'kill everything before you can do a ritual" or "hide in a room and lock the door and hope they can't break in before you complete a ritual".
Heck, it is just a
variation on the very scheme used in Thunderspire Mountain fight against the
!
