actually, Shadowfire weapon wouldnt need to be removed, just moved till later.
divine blow was made as an archmechanic to combine all the smite alignments together. Measure brought in to deal with the rather complex issue with wording in this lasts until your next turn effect.
asto interact with ubral rage: it can be used in rage as is, so why change that? this is supposed to be a guy that can take down a well balanced party with some effort.
also, proficiencies go under class abilities, and caster level goes under your spell mechanic