So Garuda right now is 5/25/45/65/80 (220 in total) of the gold chest material for the eidolon, 0/20/50/70 (140 in total) for the ssr weapon.
Ixion and onward (but not including Apocalypse/Phoenix reprint it seems?) changes the standard to 5/10/25/40/70 (150 in total) for the eidolon, 0/20/45/60 (125 in total) for the ssr weapon. The copper and silver chest materials needed for them also get reduced, but they're less of the bottleneck here anyway.

Raid and union raid type events of course follow their own reward systems.