Weekend buff this time around includes a 200% effect buff for Princess's DPS buff skills. Usually, these weekend buffs stack multiplicatively on top of gear buffs. Each of her skills originally buff by 10% per. With her related golden epic gear buffing by 150%, that effect per skill becomes 25%. With the +200% effect weekend buff, that would be 75% each. Yet the game shows 45% each, which would be 10% x (150% + 200%); additive instead of multiplicative.