In a team-fight your job as PA is simple – you want to take a hero down in a matter of seconds.
As a preparation, you want to ‘prime’ for a critical strike – you want to attack creeps until you hit them 4-5 times without crits to make it more likely to crit with your next attacks. If you do that, your next 4 hits (from Phantom Strike) will almost certainly proc Coup de Grace.
If you’re defending your base, you might want to throw Dagger on CD to soften-up your targets before the fight begins.
Initiation:
You don’t want to initiate the team-fights unless you’re certain you can kill your target – for example, you can burst down heroes like AA, Crystal Maiden, Lina very quickly, sometimes in just a couple of hits, so if you catch them out of position, you can initiate with BKB. But if the enemy you can go on is tanky and his teammates can Force/Glimmer him, or if he has an escape mechanism, it’s better to let your team initiate.
When you’re going on someone, use Stifling Dagger from a distance and then Phantom Strike on him – that way the dagger will hit the enemy a few moments after you’ve blinked on him, stacking both abilities most effectively.
Choosing your target:
Choosing a target correctly can be very important. Two conditions must be met – you want to target strong team-fight heroes (with AoE or a lot of disables, high damage output and such) with low armor. Examples:
- Sven – outputs huge amounts of AoE damage, but has over 25 armor when he activates War Cry – bad target.
- AA who’s already used his ultimate – low armor but he’s not that threatening in a fight, so he can be ignored.
- Skywrath, WD, Invoker – Low armor – check. Deals a lot of damage – check. Go on him.
- Enigma, Bane, Treant – Those are usually easy to kill but are threats only if they have their ultimate – go on them if they haven’t used ultimate yet, otherwise ignore.
If you have Nullifier/Abyssal/Bloodthorn, don’t waste them on supports who can’t do anything to you – for example, there’s no need to Abyssal a Crystal Maiden who can’t do anything to you through BKB or to Nullify a Lion who doesn’t have Force Staff or Ghost Scepter. You can save those items for later in the fight.
If your BKB ends, it might be a good idea to back off for a few seconds until Stifling Dagger and Phantom Strike are ready – without them, you’re not dealing that much damage unless you’re really farmed.
Example: