SS Agni: 3,6s per shot (10,8sfor 3 shots); Ra: 70/65/60/55/50s progression, thus 14/13/12/11/10s.
S+75s for Ult, thus 15s at all ranks.
S 90/85/80/75/70s progression, thus 18/17/16/15/14s.
S- Izanami and Kukulkan: 80s at all ranks, thus 16s. Erlang Shen: 85s at all ranks, thus 17s.
A+Most common cooldown at all ranks: 90s, thus becoming 18s.
A Chronos: 100/95/90/85/80s progression, thus 20/19/18/17/16s. Others: 100s for Ult, thus 20s at all ranks.
A-110/105/100/95/90s progression, thus 22/21/20/19/18; Cerberus: 115/110/105/100/95s, thus 23/22/21/20/19.
B 110s for Ult, thus 22s at all ranks.
C The Morrigan: 160/140/120/100/80s progression, thus 32/28/24/20/16 (At bottom because you would spend half your game with the highest cooldown)
D Stance Gods without Ults