Here’s a randomly generated cipher of unknown type. All of my ID tests put the correct type on top. A key search program got several possible keys. A hill-climber using the best scoring key got a fairly good partial solution. But to get the exact solution I had to use a Google search. I didn’t use a crib but I’ll include a caesar-shifted one.
DALRD COAVR CASML TOBIU KKDLS UGBIK CULUG MGCIK OMGUG CLSOM LRGCD
RIMEC LCDAD REUEB LUDBO ULASM SKIKE SOKLM LKCKG REMDC KCKBS KIKSK
OSOKL TDSLK IAGBD AGAGB OSSKG R