Stifling Dagger can proc Coup de Grace crits, so every dagger at level 6 has a 15 percent chance to deal your full crit multiplier.

Blink to allied creeps, heroes and summons with Phantom Strike, letting you jump two or three times in a long fight.

When getting ganked, Phantom Strike to your own creep wave or jungle camp before the stun lands to escape.

Blur gives evasion and removes you from the minimap when no enemies are near, so if your icon suddenly appears an enemy is close.

Desolator plus Coup de Grace is the core PA combo because armor reduction multiplies your crit damage.

Desolator rush is 1200 gold cheaper than a farming item and gives combat stats, so consider it over a slow build.