Fastest way to get 120 KoC?

i prefer solo training really, but honestly, the fastest trainng would be things like jesters from 60-->70, then i typically go to sand rats/scorpions at that time to go 70->75 and move up to roids at 75-->90. From 90 you can go to homuncullus for 5 more levels, then do the romeo and juliet PQ from 95-->110/115 and LHC if you can get a party. Otherwise romeo and juliet PQ can literally get you to 120 from level 90. It'll take a while, but grinding there with a party of 4 is ridiculous exp if you get a good party. Granted it's filled with lumi,kaiser, and ABs right now and they can basically solo an entire half of the fricken map because their skills hit so high, but if you get one tiny platform of 4? Still enough EXP to get you a level per PQ if your party members aren't incompetent.