Related question: How do you get so much crafting in a day? I get 2-3 in a day, if I'm lucky. That link assumes 4/day is normal.
Do you use time boosters to get more in? Do you just craft something, even if all options suck? How do you not have spell fragments left over after using up all CCs, even with constantly making CCs in your MA?
Fist of all, 4 crafts per day don't need timeboosters. Even the longest possible crafting time is only 6h and most are shorter. So I only use timeboster to get two especially good rewards (e.g military booster+ petfood). I mostly craft the military boosts, petfood and supply instances, but when there is nothing better I might craft a 20 wp spell as well.
On my live world I have 2 libraries and my fragments are perfectly balanced. On the other hand, my CCs are piling up at an extremely slow rate.
Let me do some math.
Going to the top of the spire in a gold medal fellowship will give you:
- an average of 3*4900=14700 fragments,
- exactly 22 CCs from fellowship rewards and
- around 11 CCs from chests (both regular and mystery).
You can also craft up to 28 CCs per week in the MA for a total of 61 CCs per week. Assuming you use them at a ratio of 300 SF per CC and use all 14850 fragments from the spire, you will be left with 12 CCs per week.
This calculation changes drastically, if you add the library. Each set will give you 3675 fragments and 7 CCs per week. So with 1 library you can have 18375 fragments and 68 CCs per week. At the 300:1 ratio you will still be left with 7 CCs per week.
With 2 libraries you have 22,05k fragment and 75 CCs per week. So, you can still stockpile 1,5 CCs per week.
Any more libraries than that and your fragments will start piling up as there is no way for the CC production to keep up.