I like Dreamweaver and Norther Kings spoons deep on the downrigger. Little Cleo's spoons up near the top on planer boards. Here is an article I wrote on the best salmon lures for the Great Lakes. I use to fish Lake Ontario and Like Erie quite a bit.
It sounds like a good game plan other than you should get at-least one downrigger. I have fished for king salmon in the great lakes and the ocean and kings are often deep near the bottom. Here is an article I wrote on the best down-riggers. The Scottly 1050 compact or Cannon Lake Troller seem like they would be good options. I also wrote an article on the best salmon reels.