Strat_N8 wrote:As a small aside, I'm not sure if it is actually intended that a Transcendent C'tan be able to take the same power twice, as the variant locked in the Tesseract Vault specifically must take two
different powers and the list is otherwise identical.
Given that the wording is undeniably
different for the Tessaract Vault.
(and didn't need to be, if they intended the C'tan to follow the same restriction in the otherwise identical rules) I'd say the fact that it's worded
differently is indication of the opposite from what you've stated above and that the C'tan is free to
'double up' so to speak.
As for weapon rollouts, the C'tan using transliminal slide and wave of withering x2 is it's best possible loadout.
(as necrons cannot get d-strength weaponry from anywhere else in their codex)
That said
(if d-weapons had been banned or are otherwise not your thing) seismic assault puts out an absolutely ridiculous amount of strength 8 ap3 shots, which should make short work of anything it is firing at short of another titan.
The only reason I'd consider the other powers would be if you were very strapped for points or wanted to make your c'tan as cheap as possible, in which case the storm of heavenly fire and cosmic fire would deliver a decent amount of
AP-3 firepower without breaking the bank.