Trying to gather info on the health and mainly the level 100 boss. Thanks to everyone who helped
Boss 100 health
Tier 1 (L1-25): ~300k
Tier 2 (L26-50): 3.8m (confirmed)
Tier 3 (L51-75): 7.3m (confirmed)
Tier 4 (L76-100): ~9m
Tier 5 (L101-150): <13m
Tier 6 (L151-200): 32m
Tier 7 (L201-250): 35m
Boss health increased since last boss.