I kept track of what I used (kobans and energy) to finish this "event" in time with this extremely crappy new system. It took 453 energy and 448 koban. using this, the average would be 4.53 times to get 1 shard. it takes 30 minutes to get one energy, so that is 13,590 minutes or 226.5 hours or 9.44 days to get that much energy without spending money and that is only if you never waste a single energy by letting it fill up too much. This is also impossible to get within the 3 day time limit of this event.

As for the koban, you can get 460 for 21$. Essentially this means that Fabienne is a drop that costs 20$.