Slots, Clothing, and my Sanity!

So I think I grasp the slotting concept with regard to difficulty. Before I thought it was solely proficiency-based, but now I've found out that the difficulty level is dependent upon the clothing? Is this true?
Anyhow, I would like to be able to create clothing that can be slotted with relative ease (even though my chances are hovering between 69 and 74, I only seem to have success 1/7th of the time).
How do I go about accomplishing this goal of easy slottation.
Anyhow, I would like to be able to create clothing that can be slotted with relative ease (even though my chances are hovering between 69 and 74, I only seem to have success 1/7th of the time).
How do I go about accomplishing this goal of easy slottation.
