Tiens, sur le wiki de la team Liquid, ils disent ça :
First off, don't try to hold the two chokes as far forward as they are. You want to pull your right most defenses closer to your base, so you only have two real choke points to hold, as opposed to four.
Je comprends pas, ça veut dire qu'on se retranche uniquement sur le rocher de l'artéfact, et on ne défend pas l'éco ???
You want to wall-in with bunkers/depots/turrets, and it is recommended to place a Planetary Fortress as part of your wall-in close to each ramp leading to the Artifact, as Kerrigan will choose to engage them but, with SCV's repairing, they are almost impossible to destroy. It also pays to remember that Planetary Fortresses can train SCVs on site.
Evidemment, moi j'ai pas la PF :/