Eibach camber bolts should still give a fair whack of camber adjustment, My AST's are slightly slotted (from factory) and with camber bolts can get well over 6 degree's.
As JackJack says I would be slotting the damper casing rather than the hub if you do have to slot them!
James,camber bolts and slotted struts is not a good mixture, they move. Camber bolt is designed to go into 2 small holes. Plus the bolt heads are not big enough.
Just do what I did, filed some more out of the top slotted hole.
Chip, you using the bolts with a cammed offset, and some of the material removed to get the adjustment? If so... Do you really want to go hooning into a corner with less bolt material holding it all together....? you could always file away the top mounting bolt hole in the shock as mentioned above, say about 5mm....then weld hefty washers to the new filed part, and use just one set of camber bolts on the top.
might file out the top mounting hole and see how much adjustment i get, can i use the standard bolts or use the camber bolts as well as slotting the top hole.