Weapons in FFVII were pretty easy, since both of them had more than 3 different patterns on how to beat them. Especially Ruby, since he could be paralyzed by a simples item like the Dazers xD.
To me, nothing can beat the sheer difficulty of fighting Omega and Shinryu in Final Fantasy V. You didn't had an overpowered party with overpowered items, you didn't have overpowered spells and summons, you didn't had overpowered exploits. Just your four member party doing 200-400 damage or if you were lucky, 700 damage with a Crit, per hit, while they both had double or even triple turns where they could deal 2000-4000 damage, per hit xD
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"
