This build i have found very fast very high hitting,,,

Please try it out and vote as my first try as i progress i will give you more details

Found the faster Ziggs attacks and moves the more dmg you can deal rather than slow as other builds
So, Your main ability is that bomb (Bouncing Bomb). ALWAYS get this when you can. This ability got a quite good range, and + a bouncing range. It takes some throws to learn how the bomb bounce but when you learn this spell will be awsome!

your Satchel Charge is a great ability for escaping and for making enimies go to/away from you. get this at lvl 4, and upgrade this last because the damage is nothing against Bouncing bomb.

Hexplosive Minefield Is a really nice ability, its used to trap your opponents to go around it, or throug it. Use this to your advantage, example: trap their way by using it against the wall. they will either go throug it or else go around it. If you see them go around it use your bomb, its almost 100% hit.

Mega Inferno Bomb is Ziggs Ultimate, This ability is best at close range (my oppinion) or by tower recuing. but if you see a guy with 10 hp recalling in the bush USE It. Why You should use it at short range? this is because how far the bomb goes, the longer time it takes for the bomb to "fly". If you use it short range its more chance to hit than if you would throw it across the map, + the target will probably move when hes at low hp, knowing what your ultimate does.

Speed and Little Crit Goes along way, other Ziggs that have come up against me ended up copying my items in the game

http://www.mobafire.com/league-of-legends/build/ziggs-epic-180108