Phantom Assassin

Use Stifling Dagger to secure creep lasthits.

Try to get to cornucopia early in tough lanes and skip power treads. Send out extra regen if necessary to sustain and survive the lane.

Opponents are likely to have a lot of stick charges so take that into account when playing aggressively.

You can disjoint most projectile spells and ranged attacks with Blur.

When farming dangerous areas or stacks, consider using Blur.

Make sure to max phantom strike after stifling dagger for faster farming speed.

You typically want to focus on killing disabling supports and backliners at the start of the fight.

Check opponents' inventories for break effects and evasion-piercing items. Adjust playstyle and itemization accordingly.

Pick up aghanims shard if you need the break vs heroes like timbersaw/bristleback etc..

PA uses Stifling Dagger frequently to obtain lasthits. Buy Magic Stick and Magic Wand to get charges.

PA is weak against spell harass in early game. Manage your mana and pressure her

Armor items are good against PA as she is all about physical damage

Cheap items that allow you to survive PA's Phantom Strike are Ghost Scepter, Glimmer Cape and Eul's Scepter

Consider purchasing items that pierce through evasion, breaks passives or causes magical damage to counter PA's innate passive evasion ability

PA can be killed by a well timed Blade Mail

Control power runes to prevent PA from getting double damage