The necron Deathmarks also travels through different dimensions.
But looking at the various necron dynasties, they all weathered the great sleep in different conditions. Some had nearly no trouble, others suffered from the ravages of time, alien raiders or even internal sabotage. Such as the jealous cryptek conning all of the leadership of his tombworld to sleep together, in a location he knew would be tectonically unstable. Wiping them all out and leaving him the sole major necron commander remaining upon awakening.
So it stands to reason that not every tombworld/dynasty is able to call upon the full range of their ancient technologies. Thusly nesseciting a reliance upon Dolmen Gates as a stopgap measure as they try to fully revive and piece together the remains of their realm. Especially when thinking about that it could take centuries for a tombworld to shake off ressurection lethargy.
Last edited by Brother Lucian; 05-28-14 at 01:54 PM.