Tinker

Secure ranged creep last hits with Laser and potentially harass the opponent at the same time.

If the opponents don't have great health regeneration, you can whittle them down with rocket spam.

Ask your teammates to stack and make some yourself. You can clear ancients with maxed Laser under smoke.

Look around the map to join fights or gank. Be careful not to expose yourself, especially before Blink Dagger.

Take your time and farm Blink Dagger as it greatly improves your survivability and kill potential.

Make sure to apply Defense Matrix on yourself before teleporting out of the base.

Alert your teammates to not fight at places where you cannot join them quickly.

Look for arcane and regeneration runes as you'll be able to pump in so much more damage in the fights.

Fight under your vision to be able to do more damage with rockets and position easier, even place wards yourself.

Avoid trapping yourself in tree lines where the enemy team might have an observer ward on a cliff.

You can smoke yourself here and there as another layer of protection in the fights.

Keep buyback available as you can rejoin the fights almost instantly.

Tinker is an insane highground defender. Don't give up and lift up your team's morale.

Tranquil Boots are great against Tinker as they don't break by his magical damage.

Look to gank midlane Tinker early on as he doesn't have an escape.

Tinker tends to make a lot of stacks in the jungle. Contest them or sentry off camps.

Avoid using long lasting disables and debuffs on a hero shielded with Defense Matrix due to its high status resistance.

Focus Tinker in fights as he's squishy but does insane amounts of damage.

Be aware of Tinker's Blink Dagger timing.

You can dodge Tinker's Heat-Seeking Missile by using Smoke of Deceit or blinking away.

Magic resistance items, Black King Bar or a well timed Lotus Orb are great against Tinker.

Gap closing items are great at getting on top of Tinker.

Tinker is great at split-pushing. Consider getting Boots of Travel on a core.

Place Tinker wards at the outer jungles of the map. Consider camping those spots under the ward.

It is really hard to push highground against Tinker. Be patient and take fights outside the base.