I'm sorry if this is common knowledge, but its the first time it's happened to me.
I had a PC precrowned with farslayer, thunderstroke, with 3 stacks of quarrels as well (2 standard, 1 higher metal). It seems that these two can be considered something of a 'set'.
I've only ever gotten Sun's Messenger as a crowning gift from elves, never a precrown, but is it possible that it would ever come with true aim?