When fishing extremely steep slopes or vertical cliffs you cast paralel to the face of the cliff, this doesn 't mean in any way that topwaters or jerkbaits, shallow running cranks do not work, on the contrary they are very productive ..... if you fish them right.
Why does it gets hard to fish cliffs ?
Because you are fishing them like you fish in lakes that do not have such degree of slope, while in lakes with not a lot of slope you cover terrain with the bait in lakes that look like the one in the pic you have to cover DEPTH, that 's the main difference TERRAIN vs DEPTH.
First of all, slice the cliff by layers strating from the top and progressively increase the depth with yur baits until you find the depth at which the fish are holding, remember the fish are HANGING from the cliff and they are not going to chase your bait too far, that 's why you have to fish paralel to the cliff. Position your boat not too far from the cliff, you are not looking for depth, you are not looking for structure, depth is right below your feet and structure is right in front of you.
When fishing cliffs with soft plastic baits remember that you are NOT COVERING THE BOTTOM, you are covering depth, the bottom may be in many cases hundreds of feet deep, a common mistake is pulling your bait to much with the rod tip, you pull a couple of inches and your bait sinks into oblivion. Small twitches to maintain the contact with the cliff surface are a must and eye contact with the line at all times is mandatory, fish in most cases hit the bait as it sinks, if you are not watching your line you will loose those fish. Dropshotting is taylor made for fishing cliffs too.
Tubes, wacky rigged worms, weightless T-rigged worms are great baits for fishing the cliffs, if you feel that a worm doesn 't sink fast enough you can add a split shot on top of the hook eye.
Be aware that what you are looking above the water level is the same of what 's under the water level, fish are hanging from the cliff so any slight imperfection on the composition and contour of the cliff will attract the fish, in another lake it would attract nothing. Look carefully, in places like that landslides are common and where there 's a landslide there 's a rupture in the continuity of the composition, that will attract the fish.