King Allant wasn't that hard, if you had a mobile character. His only really damaging attack (apart from the charge up, AoE attack) is his sword combo, which can be easily dodged. If you attack him only after he's pulled out all attacks in the combo, you can defeat him without much trouble.
It may be a slow process, but it's the best one (for me).
I had no idea that type of duping was possible on Demon's Souls. Then again, I never try any kind of duping in any game. That's why getting items like the Pure Bladestone on Demon's Souls, a Zod rune on Diablo II and many other very rare items in any other game is such a "Fuck Yeah!" moment.
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"
