actually i have been able to drop him since i got Lucina ._.
(Edit: oh, oops lol i cant take him drop him, i sware i could back on my easy file after i got lucina....
playing on lunatic now, haven't really tried to take him off
and i got a good idea now lol thanks 4794201, i can make Owain an Assasin because they use bows and drop Stahl
stahl is pretty good though its gonna hurt to have to drop him Q~Q)