I was wondering if all caster attributes can appear as HCT Mods on OS staves. Perhaps this information can already be found somewhere, but at least my google searches yielded nothing.
I am specifically talking about generic staves that are not linked to a specific profession (Cockatrice, Celestial, Platinum, Bo, ...). It seems likely that any (caster) attribute is possible on the HCT mod, but I cannot recall ever having seen HCT on Soul Reaping, Fast Casting or Energy Storage. On the other hand, Divine Favor and Spawning power definitely do exist.
Does anyone have any details on this? Keep in mind I am not talking about the required attribute, those are more limited and listed on the wiki. This is about the inherent HCT 20% <Attribute> mods that OS staves can drop with.