Guild Wars 2

75%) no change
50%) rare chest as per any world boss. once per day
25%) second rare chest as per any world boss, once per day
dead) big chest wih guaranteed exotic. third rare chest once per day.

So the game can be flooded with exotic every few hours when everyone figures out how to do tequatl without TS?

no.

25% – 2 champ boxes
50% – Guaranteed Rare + 3 champ boxes
75% – Guaranteed Rare + 5 champ boxes
Kill = 2 Guaranteed Rare + 5 champ boxes and the large open world chest where Ascended/Mini Teq have chance to drop.

Fine as is IMO.