I completely disagree
I refuse to see the mat in chest

This is an extremely rare comp that must reward those who play correctly.

If you put it in chest, then undersized party could loot them even if they ignore 99% of the fight
I do not count the EX primals or coil i did (or PL) with more than 5 death in the fight but cleared even so...

Those mat should only be loot during sync fight where you follow the basic strat !