Shooting with a macro lens

Greetings all

I currently use the Nikkor 105mm lens for macro work. I however sometimes would like to shoot something bigger in size like a largish Cuttlefish with the same lens. Could somebody give me some idea's on how I should measure for light or any good standard bracketing settings one should try when doing this? Also what would be the best approach with your strobes (using 2 YS-90).

Thanks in advance

Paul