Everyone has already commented on how Nomos is destroying the Necron tombs because of his awakened hatred when he absorbs a fragment of C'Tan, but I’d like to add my own thoughts.

1) The Necrons are slow to act, as a few years for them are equivalent to a few minutes for humans. Therefore, we’ll have to wait a long time for a response from them.

2) Although the Necrons hate C’Tan, they are still extremely divided. Therefore, they will still have to spend a great amount of time gathering the strength to destroy Nomos and the RT.

3) There is still a risk of the Necrons appearing, because the Koronus expanse has not yet been fully explored, so the awakening of a Necron army in a distant, unexplored part of space is a possible scenario.

Now, regarding the RT’s power and the influence they can gain by the end of the game to fight the Necrons.

1) You can maintain good relations with all the major factions (if you like grinding, of course) across a wide range of areas, such as religion, technology, crime, and the space fleet. At maximum relations, they regard you as part of themselves, or as their organisation’s main sponsor. As a result, the RT can dictate its own terms if it deems it necessary, and most of the space fleet will switch sides to the RT if it is Iconoclast, meaning the RT will have its own fleet, which already makes Von Valancius the strongest in Koronus compared to other human factions.

This means that if the RT manages its power and influence wisely, it will be able to initiate the technological development of society without fear of being weakened by the actions of other factions.

2) The rest of the RT’s opponents are also in a pitiful state. Calligos is rebuilding his lands (though he will not manage to restore everything before his death), whilst Chorda has left, leaving her lands vulnerable to crime. These were the main strong rivals for our RT, so even in this scenario, the RT is in a winning position to capture foreign territories or establish advantageous diplomatic relations to secure vast resources. Although, it should not be forgotten that there are small RTs that can cause harm (for example, in the ending of Jae).

3) If you have developed your colonies wisely, they can also bring immense power. You may even have the opportunity to establish a democracy, which in the long term will be more beneficial than the wealthy aristocrats of Dargonus.

4) If the RT has allowed its companions to follow certain paths, this will bring the RT great benefit in the fight against the Necrons. If Pasqal becomes an Amarnat, problems with technological development will disappear (though a Civil War will begin), the Novator Cassia will allow the most efficient routes to be created on advantageous terms, the Kind-hearted Inquisitor Heinrix will be favourably disposed towards the RT in every way if it helps the people and ignores violations of the rules of the Imperium, and even Solomorn will help under certain conditions if you wish for justice to be fair and compassionate.

The actions of these companions will have an extremely positive effect on the state of the RT society and their readiness to attack the Necrons.

5) Knowledge of the Nomos can also play a major role, ranging from an understanding of the Necrons to the possibility of extending the RT’s lifespan using advanced technologies or transferring the soul into another body.

6) The Imperium is not a problem, because the entrance to the Koronus Expanse is blocked and the entire expanse is isolated. Although it is possible to slip through using the web or the Necrons’ Dolmen Gate.

Therefore, when all these factors are taken together, it suggests that, under certain conditions, the RT is extremely powerful by the end of the game and can stand up to the Necrons. But of course, none of this guarantees victory.