So many ways to catch eyes on Erie it's almost ridiculous. How you approach it really depends on what part of the lake you're fishing.
Fishing the shallow West end, guys pull up limits quickly on bottom bouncers with worm harnesses at a slow troll. For the most part, they're fishing close to bottom in water that's less than 35 feet deep. A lot of fish are caught suspended off bottom on cranks too though...
In the mid lake section from say Pt Pelee to Long point, guys do well fishing 5 or more miles off shore. Lots of bonus rainbows too. Fish can be caught from 10 - 50 feet down in this area. Here, they troll a bit faster with spoons and medium size cranks. Run cranks on mono or leadcore behind planer boards or on mono off the riggers. Snap weights are another nice trick to get some extra depth on a crank. For spoons... Dipseys, riggers, lead core, cookies
Further East, from say Long point right to fort Erie, guys typically fish deep like in the middle section. Slow trolling dipseys with oversize worm harnesses and large cranks off the riggers. There are shallow opportunities here too, but for the most part, fish are in 30+ feet of water.
If you are new to fishing worm harnesses, there are a few details that are very important that you need to consider.
1. make sure that your worm is hooked dead straight. When it's in the water, it will stretch out. If you haven't spaced the hooks out right, the worm will sag and spin and won't be as appealing to the fish. It will eventually break and you'll be dragging two pieces of worm...
2. Harnesses are a slow troll presentation. For the most part, under 2mph. You can fish faster, but start off slow.
3. Harnesses and cranks work well together at these lower speeds. Spoons need more speed to get the right action. If you are running a four rod spread, two harnesses on dipseys and two cranks on in line planer boards cover a nice swath.
4. Play with lead length, blade size and colour. Sometimes, you need small blades. Other times, two oversize blades will get more bites. Sometimes, a 3 foot lead off a dipsey will work, but other times, it needs to be at least 8. Obviously, different colours will work better in different conditions.... experiment
5. make sure the leaders on your harnesses are in good shape and those hooks must be extra sharp.
Best of luck!