The HP jump between the first boss (Monk + White Mage duo) and the second boss (solo Black Mage) on hard is amazing.
The Monk had 480 HP and the WM (annoying bastard) had 300 HP....the BM alone has 2100 HP and you only have about 30 minutes between the fights.
Though, to be honest, the first boss fight was infinitely more annoying because the infinite Cures of the WM. Since even with 4 Braves with Tiz and Agnis weren't enough to dish 95 HP (the amount that the WM recovered), the battle took me 45 minutes to complete.
Current PC Build
CPU - i7 8700K 3.7 GHz (4.7 GHz turbo) 6 cores OC'd to 5.2 GHz with Watercooling (Hydro Series H110i) | MB - Gigabyte Z370 HD3P ATX | Gigabyte GTX 1080ti Gaming OC BLACK 11G (1657 MHz Boost Core / 11010 MHz Memory) | RAM - Corsair DIMM 32GB DDR4, 2400 MHz | PSU - Corsair CX650M (80+ Bronze) 650W | Audio - Asus Essence STX II 7.1 | Monitor - Samsung U28E590D 4K UHD, Freesync, 1 ms, 60 Hz, 28"
