Lachesis:
Fleet: damps, damps, damps, maybe a 20k scram. 1600mm plate and exp hardener, maybe an eanm.
Gank: High: Fill up with 200mm rail 2 and heavy launchers. I also fit a small remote armor rep
Med: AB, 3 damps, 2 20k scram, sens booster
Low: med AR, exp hardener, CPR
As far as a solo gank setup goes, get a curse.
Arazu: I'm not sure.