From what I've been made aware is that there are at least 5 different methods of Portal Casting Recall. That is merely one method out of a slew of them, Xellie. Just wanted people to be aware about that much and that there is more than what meets the eye out there.
On one hand people sound like if there's a CP team then defense be impenetrable
Historically speaking, CP has never made defenses invincible. They have been broken before with enough force, determination, and organization. Though luck or disorganization on the players on the defensive can also play an integral part on the fall of a castle's defenses. People can get restless from prolonged periods of defending. From there they can make mistakes or stop defending altogether and start rushing out instead of doing what they're supposed to do.
That one WoE where the OPC alliance in a Valk WoE managed to break through was when a single Mech of theirs got in to SD the front door and take out a large number of our forces who were trying to stave off incoming players. From there you just simply had more people trickle in until the defense failed, regardless of CP being in play or not.
Edited by GuardianTK, 15 October 2012 - 02:50 PM.