I recently started drop farming in tomb because I have too much free time... and I find 95-97 set to be very scarce. I've done 3 hours so far (LSB+LS+IDB+Random Drop Booster), In my first hour i got two b6e (sorc cast helm mage -10 boots) second hour -10 mage gloves and some b6c things. But my 3rd hour no b6 anything and 1 b5e drop. Each hour consisted of a rough guesstimate of 150ish IDB and 30-50 actual armour drops.
Edit: 4th hour got myself yet another b6e, Mage CD Helm. The elusive b6e is possible.
I made profit just from my cast helm in first hour but that was pretty **** lucky.
I drop farm a lot and enjoy it, every single mob has a different success rate imo.
Easiest mob i ever farmed on was judge ballocks in misty canyon..5-10 b5e per hour, and the odd b6e, **** that felt good.
Worst was alma in floraims ... Hate them!