Do order hall champion skills + equipments of the same type stack?
Say I got my greater elemental with a passive "+15% success when accompanied by tier 2 troops".
If I equip him with an item that grants "+15% success when accompanied by tier 2 troops", will it stack and he gets +30%?
What about traits with "+15% success vs spells", will it stack if I have 2 champions with that trait? What if he has that trait AND an equipment that grants that bonus?