School Exchange

The school exchange (Or Scrimmage) are stages that drop materials required to upgrade the Unique weapons of students. Unique equipment is unlocked once a student has been leveled up to 5 stars and provides bonus stats to the student. These bonus stats can be viewed on their respective page from Characters.

In school exchange, you will battle select students from their respective schools. Currently, there are 3 schools which include (top to bottom): Trinity, Gehenna, and Millennium. Each school also consists of 4 stages, A-D, where the latter stages are significantly more challenging but include better rewards, similar to Bounty Hunts or Commissions.

Different schools will drop different upgrade materials which cater to different guns. Trinity, Gehenna, and Millenium will respectively drop springs, hammers, and gun barrels. Springs will have a 1.5 xp multiplier when used to upgrade SMGs, SGs, and HGs; Hammers on ARs and GLs; And, gun barrels on MGs, SRs, MTs, and RGs. Firing pins will have a universal 1.5 xp multiplier.

Starting or sweeping a stage requires 10 AP for stage A or 15 AP for later stages and a ticket for the stage. 2 tickets are given for each school stage daily but more can be bought in the Shop for 30 pyroxenes. However, buying the monthly and half monthly packages will provide 2 and 1 additional ticket for each stage respectively. Additionally, the monthly and half monthly package will reduce the AP cost of clearing a stage by 10 and 5 AP respectively making the total cost 0 AP if both packages are owned. Below is a table displaying the drop rates for each stage.

Credits to Noxy#8299 and アイザヱー#6944 for the drop rates data

Recommended Units & Strategies
The following strategies are primarily for stage C but most can be applied to earlier stages as well.