Currently Epic Spell Focus Illusion allows a character to summon a clone which has -85 attack bonus. Characters can no longer possess the clone.
My suggestion is to allow it to have fighting stats once more. In the current iteration it allows an increase bonus for the line of spells however does nothing else. All other epic spell focus grants another bonus. The closest to it Epic Spell focus Necromancy summons creatures as well, which can be tailored from a list and fight alongside the caster.