Ah yes, I changed that, right; I remember now.
So basicly, all stats of pets are dependant on the total STR/AGI/INT score of the owner. This is what I call "Minion stat score". Some items and talents grant a bonus on that score, remember?
However, the spellpower of summons is the only exception; the BASE spellpower of a minion is always a fixed fraction of the owner's spellpower.
For example, the spellpower of the skeleton mage is one third of the Necromancer's spellpower. Efreet and Nymph use half of the spellpower of the Druid.