For me I find that tiny wool ties, corkies, single eggs, Jensens or any similar small presentations are only consistently successful for Coho fished deep and dead drift in faster water, especially in tailouts with rising water and lots of moving fish. They come in fresh to the pool rest in depressions or behind rocks and often seem to peck at small brightly coloured presentations as they go speeding past. I would go smallest size, hot pink, size 4 hook, short 12-14'' leader but set your float deep so the weights ticking bottom frequently and do not hold back the drift at all. An older guy turned me on to this last year and in the right conditions its very effective and a legit way to fish. I would not bother with corkies for Coho right now, they get way to much of a look at it in these conditions and blades or roe would be your best bet. Not a very popular opinion on here I'm sure but you can slay almost as many chum short floating a tuft of wool or corky than a 3 dollar jig and that learning how and when to fish all the different artificial under a number of different conditions is more interesting than mindlessly short floating bait and will make you a better rod IMO.