So I used search and did not find any threads that discuss this.
These effects do not stack (Band of Eternal Chaos vs. Wizard Doner 2.0) due to effect in slot 1 on both being summon familiar. *unless I'm smoking crack, but thats the only slot with conflict that I see*
I understand if the staff response is they should not and will not stack, personally I don't see how the potential for "Slot 6: Increase Damage v2 All Skills 15%" would be OP on a wizard which is why I am asking about this. Don't even know if that would even help spell dps. /shrug
If making them stack is something the staff would consider, I'd like to see the familiar moved from slot1 to slot3 on the band. Yes I'm whoring for more dps and parsed through the spell file and that change = win as far as I'm concerned.