This is a very easy fight overall, where most of your healing will be clearing out the absorbs from 443203. There is little change from the heroic version of the fight and the damage intake of the group is notably low so there isn't a lot of optimizing to do.
Because you will only be in range of half the raid during the whole fight Chronowarden pulls ahead of Flameshaper here as consume's strength is based on hitting the whole raid at once, while Chronowarden's main weakness of requiring good timing for ramps is also eliminated as you can easily cover your whole half with only one ta. But once again, the damage intake of the fight is low enough that it really doesn't matter and you could play whatever spec you prefer or even solo heal a side if you're good enough
You should plan to have your big healing cooldowns like rewind and lb ec when your group goes down into the add phase and takes damage from 444363 or when the raid has to run out for 442530
In short: