The Other Side: Skill resolution mechanics

Skill ranking and mechanics idea. One main goal is to just use six sided dice since they are my preferred die type and easily available.

Most likely I'll be using cascade style skills like out of Unknown Armies or broad traits like Over the Edge. Either way there will be three rankings when you choose them skilled, adept and expert. This will tell you how many dice you roll. But you only keep one, the highest. Unless you are trying something you have absolutely no skill, in that case you keep the lowest.

unskilled roll two dice and keep the lowest
skilled roll one and keep the highest
adept roll two and keep the highest
expert roll three and keep the highest

Some skills would be listed as NA for unskilled and impossible to do without possessing it.

Target numbers would depend on the action. Some would be based off a preset difficulty. For example with lockpicking the lock would have its own number that needed to be reached. 2 for the easiest and 6 for the hardest. Others such as dancing would depend on a number determined by the GM, with 2 being easy and 6 being the hardest.

Target numbers for hitting somebody would depend on the weapon and range/actions of target. Examples: Long range would add one, moving target would add one, duress would add one, weapon is low quality adds one, things like this. So if you are trying to hit a perfectly stationary target at normal range the difficulty would be 2. But a target at long range that is running and you are being shot at also (duress) would be a 5.

Of course this could make combat pretty deadly with expert fighters. But then again, shouldn't it be that way?

Thinking of some sort of instant success choice with easy task. Like the take 10 and take 20 rules from 3rd Edition D&D. Where a skilled character spends extra time to make sure he is doing it correctly and is careful.