Tier 1: Advanced Cloaking

Almost the only one "Escape Ability" you have. If you are lucky, you can Pinning Shot the enemy, and you have enough time to cloak and run away.

Tier 2: Rapid Projection

I like to spam the decoys:
Cause 1: Some enemies are afraid of the Holo Decoys, and they waste their spell on it, so you come out from cloak, and you have you start with a little benefit due to this.
Cause 2: When you will have Lethal Decoy, you have to spam it until you can one hit the enemy!

Tier 3: Anti-Armor Shells

In my opinion this is the point, when you could try to hunt down the enemies with 50%-70% HP, or below.
It is simply awesome, and necessary for the "hopefully" one-hit burst.
What should looks like this:
Holo Decoy + Pinning Shot + Precision Strike + Snipe + Auto Attack = Kill! ( If not, you should have to run )

Tier 4: Precision Strike

I think this is one of the best Heroic spell in HotS. Global range, good damage, AoE, and you can cast it twice with talent. It's also a good way, if you would like to get out the followers from you, simply cast on you, and hopefully the enemy will stop and you earn some time cloak and run far.

Tier 5: Explosive Round

I think this talent is more useful in a teamfight, than Double Tap, but sometimes I choose this. Pinning Shot would be more useful, if you choose the Crippling Shot.

Tier 6: Lethal Decoy

One of the most annoying spell in the game. I wrote why I like to choose this talent.
And a quick example: Enemy is behind a wall with very low HP, simply put a Decoy on the other side and it will do the rest.

Tier 7: Precision Barrage

No need words, double Precision Strike.
Situation: enemy base on low HP, every teammates are dead, you are alive, enemies are attacking your base. Pew-Pew --> Win! ( Trust me it could happen! :) )

Thanks for reading!
I welcome any critism!