Timers are based on when this was current content on Frostmourne S2. Assuming that they are still same as of now.
Note that for Grobbulus I added approximate timer for Slime Spray based on what I researched. It seems that each pull timers are different/randomized:
25-man pull from May 2021:
34 after pull - 30 - 56 - 28 - 60
25-man pull from June 2021:
30 after pull - 32 - 62 - 24 - 62
25-man pull from July 2021:
30 after pull - 34 - 60 - 34 - 58 - 32
25-man pull from August 2021:
34 after pull - 32 - 56 - 32 - 56
25-man pull from Lordaeron in October 2021:
32 after pull - 26 - nothing for 57
10-man pull from Icecrown in April 2021:
36 after pull - 30
I don't think they changed timers so often, it seems like each pull it just randomizes intervals to be used during boss. The consistency here is seperate 1st Spray and every 2/4/6.. is shorter, then every 3/5/7.. is long. I just approximated to 32 - 31 - 59. Maybe this will be changed for Frostmourne S3, will have to see then.
Timers are based on when this was current content on Frostmourne S2. Assuming that they are still same as of now.
Note that for Grobbulus I added approximate timer for Slime Spray based on what I researched. It seems that each pull timers are different/randomized: 25-man pull from May 2021: 34 after pull - 30 - 56 - 28 - 60
25-man pull from June 2021: 30 after pull - 32 - 62 - 24 - 62
25-man pull from July 2021: 30 after pull - 34 - 60 - 34 - 58 - 32
25-man pull from August 2021: 34 after pull - 32 - 56 - 32 - 56
25-man pull from Lordaeron in October 2021: 32 after pull - 26 - nothing for 57
10-man pull from Icecrown in April 2021: 36 after pull - 30
I don't think they changed timers so often, it seems like each pull it just randomizes intervals to be used during boss. The consistency here is seperate 1st Spray and every 2/4/6.. is shorter, then every 3/5/7.. is long. I just approximated to 32 - 31 - 59. Maybe this will be changed for Frostmourne S3, will have to see then.