As EncodedNybble said, chunks of cloudstone are pretty rare, because it seems that there's an odd glitch about the drops for chunks. It's easier to get pures than chunks of cloudstone.
Adjudicator is globaly recognized as the easiest boss of the game. Even if you get hit by it's sword, it takes very few health, even at NG+. The only damaging attack that he has is his tongue attack when you're in the upper level.
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"
