You need like 300-450 fragments to make the weapon and the units.
Assuming you average 4 per run and do 4 runs a day, you'd need 19 days to get 300 fragments. The schedule only runs for 2 weeks, so you'd have 5 days of 4 runs you'd have to make up to complete the set. Once it's out of the main rotation, there will be only like 2 runs a day, so it will be more like 10 days of 2 runs. And that's not even counting the part that you need another 100 per unit to make the 13* version. Even the mission pass freebies won't make up for this.
What's even dumber is that we get 2 of the amphirite. Realistically, we won't even be able to make one before it gets outdated. When this happened with Deus, he barely dropped any zeinesis weapons, and you could barely get enough cliffard mats to do anything. Is there going to be a trade in for the fragments later on, before ep6 makes it useless?