Vitiate's Power in the Force - Major Question
"Lord Vitiate takes command of the Sith Empire, now in shambles following the Great Hyperspace War. He executes the Sith Council and consumes the life force of thousands of Sith Lords in a terrifying ritual that extends his life and vastly increases his capacity as a practitioner of the Force."
From (Star Wars: The Old Republic: Encyclopedia)
We know that after Vitiate has absorbed Medriaas' power he received a massive boost.
But my question would be the following:
-does the boost he benefits end after all?
Let's take a look at Exar Kun's Sith ritual:
-he absorbed the Massassi's lifeforce and he harnessed it in 'preserving' his own spirit alive(initially he stole their lifeforce so he would escape Yavin 4 as spirit and roam the galaxy until he would find a way back to return)
-Palpatine drained the lifeforce of Byss' people and used that energy to reinvigorate himself
-Nihilus used the energy he stole(in some part) to satiate his endless Hunger
So, the question is obvious:
Didn't Vitiate 'waste' those Force reserves that he had stolen on prolonging his life for centuries?
I know it says that it had made him more powerful. But Force energy is Force energy. And he had used it in extending his life span.
The ritual lasted ten days. Lord Vitiate orchestrated the sorcery and the planet Medriaas was consumed by the largest dark side nexus the galaxy would ever see. When the ritual ended, Lord Vitiate emerged as the only survivor. The pain, energy, and suffering of every living entity on the planet fueled his power and would prolong his life for centuries."
From (Star Wars: The Old Republic: Encyclopedia)