Guild Wars 2

it would be better if they increase the reward after finishing a jumping puzzle, not just some random greens/blues.

I’ve gotten exotics from them, but it’s very rare. Usually just greens, t5 gems, and crests.

It they dropped T6 mats, I would do every puzzle every day.

It seems to depend upon the type of chest (Splendid, Magnificent, Glorious etc.) as well as the level of the zone you do the JP in. JP’s in low level zones like Goemm’s Lab or Morgan’s Leap will never give anything higher than blues or greens appropriate for their zone. (In some cases, this can actually work in your favour, because the level cap means that you have increased chances of getting, say, Silver Doubloons from a chest, and you won’t ever get a Gold Doubloon or higher.)

I’ve gotten Rares from the chests in the 3 JP’s in Lion’s Arch, but no Exotics so far.

I never got any rare’s from Lion’s arch’s jumping puzzles and I do them on an almost daily base. So far the only rare was beryl gem.