The highest stacking % combo I know of is 25%dmg ad, 30%damage elix and the 25%stacking dmg (hfatima/fatima). If you open a 30%dmg elixir together with a pet that doesnt explicitly state “(stacking)”, only the highest dmg% multiplier will take place. E.g : Electra 35%>Elix 30%. Elix 30%>Arm zhul 15%. The 25%dmg ad always stacks with anything, except for the 25%dmg elix available for 100 plats on store.