No it doesn't need to be cured but if cured while standing away they can rejoin the raid quicker.
Additionally just keep paldar in the raid so he gets aoe damage. There are no real issues with doing this since there appears to be no frontal, etc.. the golem is another story, keep him away.
We have cursed people just move out of range, stand there, let curse drop off, then rejoin the fight. It doesn't have to be cured.
You still have to cure the curse, you just need to have them run out to max cure range and get cured. Only the cure'e will get stunned, but its better than stunning the whole raid.
Where is the stun coming from? we have the cursed person leave the room and not cure and we seem to still get stunned...is there an AOE that stuns during the fight as well?
This fight was discussed heavily at FF. The changes came out of those discussions.
Sleeper's Tomb: a Temporal Leap [Raid]
Paldar Bladesoul – The conscripted erudite adds spawn less frequently. Paldar and the enkindled sentry golem now share health when they normalize, rather than the more damaged NPC healing to the same health as the least damaged. They now normalize to their combined health divided by 2 (approx).