The specs on that rod sound great for coho. As jim said 12lb mono mainline would be my choice, and 10 or 8 flouro leader. Personally I dont like fishing rods this soft if there are chum and/or springs around. Such a chore to get them in, and, if you end up releasing the fish, IMO the rod is unethical as the poor fish will likely be exhausted by the time you get it in with your undergunned rod. Also you risk breaking such a rod on these huge fish. On a slower run with lots of room to play the fish it can certainly be done, just not the best tool for the job.
I prefer to use a medium power rod for coho when chum and springs are around. 8-17 or so rated. 15mono mainline and 12 mono or flouro leader depending on water conditions. When targeting springs or chum specifically then I feel a medium-heavy rod is in order, 12-20 line rating or similar. And it does not matter is the rod is 11 feet. Anything in the 10 to 13 foot range is fine depending on your preferences, it's the power/backbone of the rod that matters.