Repitching yeast won't do you any good, you've already got plenty in there. 1318 can floc early sometimes so rousing the yeast can help. If anything I'd pitch a pack of US-05 or something similar if you have any available.
US-05 might help a bit if there actually is anything left to munch on. It definitely won't hurt the beer though. If that doesn't do anything I say just package it and see what the final product is like.