Fastest way to level up?

Hey just reached level 80 and i want level 90 asap i donate a ton so that's not the problem any upgrades that give more xp per build time?

Nope, time equals nothing, and XP equals nothing.

Haha but for real i want that level 90 badge

http://clashofclans.wikia.com/wiki/Experience

roughly 1 xp per 1000 seconds of build time, so anything is fine.

The fastest way is to train a bunch of giants. Go hopping through randoms clans, donate, leave of to the other clan. Why does it mature though?

There is none because leveling up is pointless.

If you are looking for a clan or recruiting for your own clan, having a high level tends to work in your favor.

That's about all it is good for.

Here you go http://www.youtube.com/watch?v=0HpIArD8aJM