A few questions
1) One of the more popular things to do with Rage Prophet is use the ragecaster ability to gain bonuses on save dc's of offensive casting. RAW, this does not work because all bonuses of a rage are suspended while using moment of clarity to cast a spell, which I assume would lose the con bonus as well. Sure a rage prophet is likely to have a high natural con, so it'll still be likely to be a +3 to +5 bonus, but the raging itself doesn't help the casting with its own con boost. This seems counter to the class flavor and the name of the ability itself.
2) How would this interact with Urban Barbarian's special brand of raging? I know the most common interpretation is that you still cannot do anything that requires patience or concentration while raging, but it says you can use int/wis/cha based skills, so you can paint a picture, craft an alchemical item, or research ancient knowledge, which don't seem to require more patience and concentration than casting a spell, especially not with the flavor of a rage prophet.
3) When using moment of clarity, you lose all benefits of your rage - what about the hit points? Do you suddenly fall unconscious if you're down to just your bonus hit points?
Help!