I'm gonna go ahead and say it takes at LEAST three hours, if not more. You need 45 calcified fragments - not all of which can be simply gathered - Strikes (you have to run the whole strike unless you're a quitting jackass), tier 3 CoO, every different configuration of tier 2 CoO... And maybe the tier one ones? All of which have to be summoned by YOU in order to receive the fragments. It's not QUITE as simple as you make it sound.