Sticky Bomb attaches to enemies and slows them, so use it to harass in lane and set up ganks.

Proximity Mines are invisible and deny areas, so place them at Roshan, chokepoints, and high ground.

Blast Off launches you into enemies for damage and a stun, so use it to initiate or secure kills.

Reactive Tazer disarms attackers and explodes at the end, so pop it to survive dives.

Techies controls the map by forcing enemies to avoid mined areas, so place traps at objectives.

You are fragile with low mobility, so stay near your mines and avoid open fights.