Tinker

Boush the Tinker is a ranged intelligence Hero who relies heavily on his assortment of nukes for ganking and pushing. While he does have rather low stat gain, he is able to reset the cooldown on his abilities, which in conjunction with Boots of Travel gives Tinker global mobility rivaled only by Nature's Prophet, which combined with his two high damage nukes, Laser & Heat-Seeking Missile make him a constant threat. Tinker abilities' mana costs are very high, however thanks to his ultimate Rearm, and Boots of Travel, Tinker can simply to go back to base to refill health and mana, Rearm and go back to the lane to push or gank once more. Acquiring said boots early with a level advantage is key to success, considering he is lackluster without them. With the right item, mana management, and ability management, there is little that stands in the way of this spamming hero.

Tips

 * Laser is an extremely powerful nuke that ignores magic resistance. Use it as primary source of damage.
 * If there is only one opponent on your lane, you should max out laser first, as it deals high damage per mana cost compared to heat seeking missle. The blind effect should never be underestimated as it gives 100% miss chance for a short while.
 * Heat Seeking Missile has a really long range. With rearm, you can spam a barrage of heat seeking missiles as to harass enemy heroes.
 * March of the Machines is a perfect farming tool. It's a bit tricky to aim though. You can overlap several March of the Machines using Rearm to deal massive area of effect damage.
 * Bottle is a great item to have on Tinker, even if you're not laning in middle lane. It decreases the time you're in the fountain and increases the time you can stay out of base.
 * You can stack commands by holding shift to prevent unintentional Rearm interruptions. The Tinker will perform stacked commands right after finishing Rearm.
 * Boots of Travel is a key item on Tinker. Used in conjunction with Rearm, it allows you to teleport around the map quickly.
 * Once the Tinker gets Boots of Travel and Soul Ring, start teleporting back and forth between lanes and fountain to farm everything on the map. Try not to steal farm from other heroes on your team that may need it.
 * Stacking the ancient camp, then taking it out with March of the Machines can provide significant gold income for Tinker. Teleport near the camp a few seconds before xx:53 so you can stack it in time.
 * Getting either a Blink Dagger or Force Staff, or both is a wise decision after getting BoTs, Soul Ring, and Bottle. Blinking immediately after teleporting should prevent any attempted ganks, and March has enough range to farm a wave even if you blink into trees. Force Staff provides 10 intelligence, but not quite as strong of a repositioning tool.
 * It's not always best to level up Rearm at levels 6, 11, and 16. At level 6, if you don't have Boots of Travel or a Soul Ring, you won't have the mana to sustain Rearm. It's usually best to pick up your ult once you've gotten BoTs or can clear out stacked ancients with March + Soul Ring + Rearm. This is usually a good way to get the last 1000 gold to get BoTs and get a level or two. For levels 2 and 3 of Rearm, consider how large your mana pool is before adding the point.
 * Participate in ganks whenever you get a chance. "Missile, Laser, Rearm combo" should be enough to finish off any fleeing enemy early-mid game.
 * Always kill enemy silencers and disablers first because they can ruin your spell combos.
 * The Tinker can permanently disable and kill enemy carries in the late game phase. Simply repeat "Scythe of Vyse, Missile, Laser, Rearm" cycle till your target is dead. Make sure you have sufficient mana pool and you're performing everything quick enough.
 * Ethereal Blade is also a very useful pick-up on Tinker. Although it counts more as a luxury than anything else, it will amplify the effects of Dagon and Rockets (but not laser, since it's pure damage) by 40%, making them do 1120 and 455 damage (when fully upgraded). Few heroes in the game can withstand a combo of missile, ethereal, laser, dagon, rearm and repeat. Timed properly, the combo (fully upgraded with 125 int, after 25% magic reduction) does 1842.5 damage.
 * Be careful when you use your spell combos as the Tinker is extremely mana-hungry. A few lasers and you will quickly find yourself without mana if you're saving up for Boots of Travel or Scythe of Vyse.
 * When facing auto attack-heavy heroes such as Lone Druid and Ursa, it may be wise to build Heaven's Halberd. In conjunction with laser, you effectively can disable auto attackers up to 6 seconds for melee heroes and 7 seconds for ranged heroes. Adding Scythe of Vyse up on this brings a disable of 9.5-10.5 seconds. Using Rearm properly allows you to completely shut down certain heroes.
 * When the Tinker acquires Boots of Travel and has enough mana to rearm and withdraw, he is able to confuse opponents because his pushing ability forces the opponent to defend their towers and he's just able to "Lane-Fountain-Lane", again and again.
 * March of the Machines is an extremely powerful counterpush tool and can be used to stop a push by yourself by casting it with Rearm.

Trivia

 * The Tinker's voice actor, Harry "Hal" Robins, also voiced Dr. Isaac Kleiner in Half-Life 2 and the scientists of Black Mesa in Half-Life. Many of Tinker's voice lines reference characters and events from the Half-Life universe. In addition, the name "Violet Plateau" is quite similar to "Black Mesa," and the events described in Tinker's backstory are remarkably similar to the events of Half-Life.
 * The Tinker's alternate/fun name in DotA was "X!!", name of a professional DotA player.
 * Tinker's line "I tink! Therefore I am!" is a reference to the philosophical statement "I think, therefore I am." proposed by René Descartes. Its original Latin words are "Cogito ergo sum."
 * Tinker's line "Tinker, failure…Soldier…Fie…" is a reference to the 1974 spy novel Tinker, Tailor, Soldier, Spy by British author John le Carré about George Smiley (who was played by Gary Oldman in the 2011 film adaptation).