i just fished arbroath last night , i dont know area very well , but fished the cages a couple off times,
best bait for me yesterday was mackerel , cut into strips and bound onto hooks with elastic, i used size 4/0 's , on short pulley rigs.
the other bait i had didnt catch on the night. but im sure it may vary.
good luck and post up a wee report,